Yes, stress can cause erectile dysfunction (ED). When you are under pressure, your body releases stress hormones that work against the relaxed, aroused state an erection needs, and worry about sex can turn one bad night into a pattern. Stress-related ED often improves once the stress is dealt with, and treatment can help in the meantime.

Stress is not always the whole story, though. ED can also be a sign of a physical problem such as heart disease or diabetes, so it is worth getting checked if it keeps happening.

How does stress affect erections?

An erection starts in the brain. Arousal sends signals through the nerves to the penis, the smooth muscle in its blood vessels relaxes, and blood rushes in. For that to happen, your body needs to be in “rest” mode, not “alarm” mode.

Stress flips the switch the other way. Your nervous system moves into fight-or-flight mode and releases stress hormones such as epinephrine (adrenaline) and cortisol. As MedlinePlus explains, these hormones make your brain more alert, tense your muscles and raise your pulse. That helps you react to danger, but it is the opposite of what an erection needs. Epinephrine tightens blood vessels and the smooth muscle in the penis, so less blood flows in and an erection is harder to get or keep.

Most men have an occasional erection that fails. The NHS notes that one-off problems are usually caused by stress, tiredness or too much alcohol. It becomes a concern when it keeps happening.

What is performance anxiety, and why does it snowball?

Performance anxiety is worry about how you will do in bed: whether you will get an erection, keep it, or satisfy your partner. It often starts after one disappointing experience. Next time, you go in nervous and spend the moment watching yourself instead of enjoying it. That worry triggers the same stress response, the erection fades, and the fear grows.

This cycle is common with a new partner, after a breakup, or during a tough stretch at work. Many men find erections are fine when they are alone or relaxed, but let them down when the pressure is on.

Can long-term stress cause lasting ED?

Chronic stress works more slowly. When stress goes on for weeks or months, your body stays on alert even when there is no real danger. MedlinePlus links chronic stress with high blood pressure, heart disease, diabetes, obesity, depression and anxiety. Several of these are also physical causes of ED, because they affect the blood vessels and nerves that erections depend on.

Stress also brings habits that make things worse: poor sleep, more drinking, smoking and less exercise. Relationship strain matters too. MedlinePlus lists stress, fear, anxiety, anger and poor communication with a partner among the emotional causes of ED.

How can you tell if ED is psychological or physical?

Only a doctor can say for sure, but some patterns help. A useful clue is whether you still get erections during sleep or on waking. Most men have 3 to 5 erections a night, each lasting about 30 minutes. According to MedlinePlus, if you still have erections at night or in the morning, the cause is likely not physical.

Many men have a mix of both: a small physical problem makes erections less reliable, which sparks anxiety that makes things worse. And “psychological” does not mean imaginary. Stress-related ED is real, common and treatable.

What helps stress-related ED?

Lower your overall stress

• Move every day. Brisk walking, cycling or swimming eases tension and supports healthy blood flow.
• Protect your sleep with a regular bedtime and at least 7 hours a night.
• Keep alcohol moderate and stop smoking.
• Take a few minutes each day for slow breathing, meditation or time outdoors.

Take the pressure off sex

Talk openly with your partner. Simply saying that stress is affecting you often eases tension on both sides. Some couples agree to focus on touch and closeness for a while, with intercourse off the table, so there is nothing to “perform.” If you notice yourself checking on your erection, gently bring your attention back to the moment.

Consider counseling or sex therapy

The NHS notes that counseling and therapy can help when erection problems are linked to emotional or mental health issues, and MedlinePlus adds that counseling can help both you and your partner. A sex therapist may use sensate focus, a step-by-step program of pressure-free touching that helps couples rebuild confidence. In the US, look for a licensed therapist with training in sexual health, such as one certified by AASECT (the American Association of Sexuality Educators, Counselors and Therapists). If anxiety or depression is part of the picture, treating it can help your sex life too.

When do ED tablets like sildenafil and tadalafil help?

PDE5 inhibitors such as sildenafil (Viagra) and tadalafil (Cialis) can help even when stress is the main cause. They improve blood flow to the penis when you are aroused, so erections become more reliable while you work on the root cause. For some men, a few successful experiences ease the worry and help break the anxiety cycle.

These tablets do not create desire or cause an erection on their own. The FDA label for Viagra states that sildenafil has no effect without sexual stimulation. Usual dosing from the US labels:

• Sildenafil: 50 mg about 1 hour before sex (anywhere from 30 minutes to 4 hours before). Your doctor may lower it to 25 mg or raise it to the maximum of 100 mg, no more than once a day.
• Tadalafil: 10 mg as needed (range 5 to 20 mg, no more than once a day), which can improve erections for up to 36 hours. A low daily dose of 2.5 to 5 mg means you do not have to time a tablet around sex.

To compare them, see our guides to sildenafil vs tadalafil and daily vs as-needed tadalafil. Suhagra 50 mg contains the same active ingredient as Viagra, and Tadacip 20 mg the same as Cialis; both are made and licensed in India by Cipla. Other options are in our erectile dysfunction range. These are prescription medicines and should be used under a doctor’s care.

Safety first: never take a PDE5 inhibitor with nitrate medicines, such as nitroglycerin (glyceryl trinitrate) for chest pain, or with riociguat, because blood pressure can drop dangerously. Tell your doctor if you take alpha-blockers or other blood pressure medicines. Get emergency help for an erection lasting more than 4 hours, and stop the tablet and seek help right away for any sudden loss of vision or hearing.

When to see a doctor

See a doctor even if you are sure stress is the cause. MedlinePlus notes that ED may be a sign of health problems such as diabetes or heart disease, and the Viagra label warns of a possible heart risk from sex in men who already have heart disease. A doctor can check your blood pressure, blood sugar and cholesterol, review your medicines, and make sure your heart is healthy enough for sex. Get checked promptly if:

• Erection problems keep happening, or happen more than about 1 in 4 times.
• ED does not improve with lifestyle changes, or started after an injury or prostate surgery.
• You also have low back pain, belly pain or changes in how you urinate.
• You get chest pain, dizziness or nausea during sex. Stop and get medical help right away, and call 911 for chest pain that does not go away.
• An erection lasts more than 4 hours. Go to an emergency room.
• Stress, anxiety or low mood feels overwhelming. If you have thoughts of suicide, call or text 988.

Frequently asked questions

Can stress-related ED go away on its own?

It often gets better once the source of stress eases, especially if you keep sex low-pressure in the meantime. If it keeps happening, talk to a doctor.

Do morning erections mean my ED is psychological?

They are a strong clue that the blood vessels and nerves involved in erections are working, which points toward stress, anxiety or relationship factors. They do not rule out every physical problem, so a checkup is still worthwhile.

Can a PDE5 tablet help with performance anxiety?

It can make erections more reliable when you are aroused, which may ease the worry over time. It does not treat the anxiety itself, so pairing it with stress management or counseling usually works better than a tablet alone.

Can medicines for anxiety or depression cause ED?

Yes. Some antidepressants, such as fluoxetine and sertraline, and some anti-anxiety medicines can affect erections. Never stop or change a medicine on your own; your doctor may be able to adjust your treatment.

This article gives general information and does not replace advice from your doctor or pharmacist. Prescription medicines, including sildenafil and tadalafil, should be used under a doctor’s care.

Tadalafil, the active ingredient in Cialis, is the only erectile dysfunction (ED) tablet licensed for two quite different routines: a low dose taken every day (2.5 or 5 mg), or a higher dose taken as needed before sex (usually 10 mg, adjusted to 5 or 20 mg). It is the same medicine either way, but the two plans suit different men, relationships, budgets and health conditions. This guide compares them side by side so you can decide with your doctor which one fits you.

Daily vs as-needed tadalafil at a glance

Why tadalafil can be taken two ways

Like sildenafil (Viagra), tadalafil is a PDE5 inhibitor. It blocks the enzyme that breaks down cGMP, the chemical messenger that relaxes blood vessels in the penis during arousal, so an erection is easier to get and keep. It does not cause an erection on its own; sexual stimulation is still needed.

What makes tadalafil different is how long it stays in the body. Its half-life is about 17.5 hours, compared with roughly 4 hours for sildenafil. That long tail is why a single as-needed dose keeps working for up to a day and a half, and why a small dose taken every day builds up to a steady, effective level. Our sildenafil vs tadalafil guide covers the wider differences between the two medicines.

How daily tadalafil works

With the daily plan you take one low-dose tablet at about the same time each day, with or without food. Blood levels rise over the first few days and reach a steady state after around five days, so the full benefit is not instant. After that, you do not need to time anything around sex.

• Starting dose: the US label starts daily use for ED at 2.5 mg, which can be raised to 5 mg. For an enlarged prostate, or ED and BPH together, the dose is 5 mg.
• Missed dose: take it when you remember the same day, but never take two tablets in one day to catch up.
• Give it time: judge the plan after a few weeks of regular use rather than the first couple of days.

Daily dosing tends to suit men who have sex twice a week or more, couples who dislike planning around a pill, and men who also have urinary symptoms from an enlarged prostate. Generic options include Vidalista 5 mg, Tadalista 5 mg and, for the lower starting dose, Vidalista 2.5 mg.

How as-needed tadalafil works

On the as-needed plan you take one tablet at least 30 minutes before sex. Most men start on 10 mg; your doctor may raise it to 20 mg if the effect is not strong enough, or lower it to 5 mg if side effects are a problem. A fatty meal does not delay tadalafil much, which is one practical advantage over sildenafil.

Because one dose can last up to 36 hours, as-needed tadalafil earned the nickname “the weekend pill.” It suits men who have sex once a week or less, whose sex life is fairly predictable, or who simply prefer not to take a medicine every day. Common 20 mg generics include Vidalista 20 mg, Tadalista 20 mg and Tadacip 20 mg.

Which plan works better?

Both regimens clearly outperformed placebo in clinical trials, and studies that compared them directly found broadly similar improvements in erections. In other words, neither plan is “stronger” in a way that matters for most men. The decision usually comes down to four practical questions:

1. How often do you have sex? Several times a week favors daily dosing; occasional sex favors as-needed.
2. Do you value spontaneity? Daily dosing removes the need to plan, which some couples find makes a real difference.
3. Do you have urinary symptoms? Only the daily 5 mg plan treats an enlarged prostate.
4. How do you tolerate the medicine? Men who get headaches or back pain on 20 mg sometimes do better on a lower daily dose.

The prostate (BPH) benefit

Tadalafil 5 mg once daily is FDA-approved for the urinary symptoms of benign prostatic hyperplasia (BPH): a weak stream, hesitancy, needing to urinate often and getting up at night. For men who have both ED and BPH, a single daily tablet can help with both. Improvement in urinary symptoms is usually noticeable within a few weeks.

Urinary symptoms can have other causes, including infection and prostate cancer, so have them checked by a doctor before treating them yourself. If you already take an alpha-blocker such as tamsulosin or doxazosin, your doctor needs to plan the combination carefully because both medicines lower blood pressure.

Tablets and cost per month

Price is often the deciding factor. Daily dosing needs about 30 tablets a month. As-needed use twice a week needs about 8 or 9. Low-strength tablets usually cost less each, but the monthly total for daily use can still be higher than occasional as-needed use. Compare the pack prices on the tadalafil range against how often you actually expect to take a dose.

Splitting a 20 mg tablet into quarters to make “daily” doses is not a reliable shortcut. Film-coated tablets are not designed to be divided into four, and the pieces can vary widely in strength. If cost is a concern, ask your doctor whether a 2.5 mg daily dose or a lower as-needed dose would work for you.

Side effects compared

The side effects are the same type on both plans: headache, indigestion, back pain, muscle aches, flushing and a stuffy nose. Back and muscle pain typically appears 12 to 24 hours after a dose and fades within a couple of days. Because the daily dose is lower, these effects are often milder, though they can occur on any day rather than only after an occasional tablet.

Get medical help straight away for an erection lasting more than 4 hours, sudden loss of vision in one or both eyes, sudden hearing loss or ringing in the ears, or chest pain, dizziness or fainting during sex.

Who should not take tadalafil

• Anyone using nitrates for chest pain, such as nitroglycerin sprays or tablets and isosorbide mononitrate or dinitrate, or recreational “poppers” (amyl nitrite). The combination can cause a dangerous drop in blood pressure. If you develop chest pain after taking tadalafil, tell the emergency team when your last dose was, because nitrates should not be given within 48 hours of it.
• Anyone taking riociguat for pulmonary hypertension.
• Men whose heart is not healthy enough for sexual activity, or who have had a recent heart attack or stroke, or have very low or uncontrolled high blood pressure.
• People with severe liver disease, for whom tadalafil is not recommended, and people with severe kidney disease, who should not use daily dosing and need a much lower as-needed limit.

Strong CYP3A4 inhibitors, including ketoconazole, itraconazole, clarithromycin and HIV medicines such as ritonavir, raise tadalafil levels; your doctor will lower the maximum dose (daily dosing is capped at 2.5 mg). Heavy drinking, around five or more drinks, increases the risk of dizziness and fainting. Never combine tadalafil with another ED tablet.

Switching between plans

Many men try one plan first and switch later, for example moving to daily dosing once a relationship becomes more regular, or moving back to as-needed to cut costs. Switching is straightforward, but agree the new dose with your doctor and remember the golden rule: one dose of tadalafil in any 24 hours. Do not add an as-needed tablet on top of your daily one.

Frequently asked questions

Can I take 5 mg only before sex instead of every day?

Yes. 5 mg is also a licensed as-needed dose, usually for men who get side effects on 10 mg or who need a lower dose for medical reasons. Some men find it is all they need.

How long before daily tadalafil starts working?

Some men notice a difference within a few days, but levels take about five days to stabilize. Give the plan at least two to four weeks before judging it.

Is daily tadalafil safe long term?

It has been studied in long-term trials and is widely used for both ED and BPH. Regular check-ups with your doctor, including blood pressure and a review of other medicines, keep it safe.

Does tadalafil increase libido or size?

No. It improves blood flow in response to arousal. It does not change desire, size or fertility.

Is Vidalista the same as Cialis?

Both contain tadalafil; Vidalista is an Indian generic, made and licensed in India. Read our Vidalista vs Cialis comparison for the details.

This article gives general information and does not replace advice from your doctor. ED can be an early sign of heart disease, diabetes or low testosterone, so have a check-up before starting treatment.

Fildena and Cenforce are two of the most widely recognized Indian generic brands of sildenafil citrate, the active ingredient in Viagra. Fildena is made by Fortune Healthcare and Cenforce by Centurion Laboratories. People often ask which one is stronger or works better. The short answer is that, dose for dose, they contain the same medicine, so the real differences lie elsewhere. Here is how they compare.

Fildena vs Cenforce at a glance

Same drug, same dose, same effect

Both brands contain sildenafil, a PDE5 inhibitor that improves blood flow to the penis when you are sexually aroused. A 100 mg tablet of either brand is intended to deliver 100 mg of sildenafil, so you should expect the same timing: it starts working within 30–60 minutes and helps for around 4–5 hours. The side effects and safety rules are identical too.

Because neither brand is licensed in the US, UK or EU, neither has been through those regulators’ bioequivalence testing against the original. Online claims that one brand is “stronger” than the other at the same milligram strength are not backed by published data.

Where they differ

Manufacturer

The biggest difference is who makes them. Fortune Healthcare and Centurion Laboratories are separate Indian companies with their own factories and quality systems. Some people simply trust or tolerate one brand better, often out of habit.

Color and coating

Fildena tablets are purple, Cenforce tablets are blue. The coating and inactive ingredients differ slightly, which very occasionally matters for someone with an allergy to a particular dye or excipient.

Format choice

Fildena has a slightly wider range of formats, including Fildena CT 100 mg (a chewable tablet) and Fildena Super Active (a soft gel capsule). Cenforce offers Cenforce Soft 100 mg and a sublingual Professional version. Chewables can help people who dislike swallowing tablets, but they are not meaningfully faster in reliable studies.

Price

Prices are close. On our store, packs of Fildena 100 mg start from $70 and packs of Cenforce 100 mg from $75, with lower strengths costing less.

Picking the right strength

The strength matters far more than the brand. Sildenafil is licensed at 25, 50 and 100 mg, with 100 mg once a day as the maximum.

• 50 mg is the usual starting dose (for example Fildena 50 mg).
• 100 mg is for men who have tried 50 mg without enough effect and without troublesome side effects.
• 25 mg suits people over 65, those with liver or severe kidney problems, those on medicines that raise sildenafil levels, and anyone who gets side effects at 50 mg.

The 120, 150 and 200 mg tablets sold by both brands go beyond any approved dose. They add risk without proven extra benefit, so we do not recommend them.

Safety rules for both brands

• Never take sildenafil with nitrates (such as GTN spray or isosorbide) or riociguat.
• Take only one dose in 24 hours and never mix brands or formats on the same day.
• Seek urgent help for an erection lasting more than 4 hours, sudden vision or hearing loss, or chest pain.
• Tell your doctor about alpha-blockers, HIV medicines and antifungals, which can interact.
• Heavy meals delay the effect; heavy drinking reduces it.

How to spot counterfeit tablets

Fake sildenafil is one of the most counterfeited medicines in the world, and popular brands such as Fildena and Cenforce are copied too. Whichever brand you use, look for these signs of a genuine pack:

• A sealed blister strip with the brand name, strength, batch number and expiry date printed clearly on the foil.
• Tablets that are consistent in color, shape and embossing, with no cracks or powdery edges.
• A patient leaflet or carton with the manufacturer’s name and address.
• A supplier that shows its contact details and answers questions about the product.

If tablets look different from your previous pack, or cause unusual side effects, stop taking them and speak to a pharmacist.

Fildena or Cenforce: which should you choose?

If one brand already works well for you, there is little reason to switch. If you are choosing for the first time, pick a standard strength, then decide on format and price. If you would prefer a licensed product, ask your doctor about Viagra or licensed generic sildenafil instead; our comparison of Cenforce vs Viagra explains the trade-offs. Every option is listed in our sildenafil range.

Frequently asked questions

Is Fildena stronger than Cenforce?

Not at the same strength. Fildena 100 mg and Cenforce 100 mg both contain 100 mg of sildenafil.

Can I take Fildena and Cenforce together?

No. That would double the dose of sildenafil. Take one tablet of one brand, at most once a day.

Why is Fildena purple?

It is simply the color of the tablet coating, which helps the brand stand out. It does not change how the medicine works.

Do chewable versions work faster?

Any difference is small. Food and timing affect onset more than the format does.

For general information only. Sildenafil is a prescription medicine; please see a doctor before using Fildena, Cenforce or any ED treatment.

Vidalista and Cialis both contain tadalafil, the long-acting erectile dysfunction (ED) medicine often called “the weekend pill”. Cialis is the original brand developed by Eli Lilly; Vidalista is an Indian generic made by Centurion Laboratories. This guide compares them on the things that actually differ, from licensing and strengths to daily versus on-demand use, so you can talk it through with your doctor.

Vidalista vs Cialis at a glance

How tadalafil works

Tadalafil is a PDE5 inhibitor, the same class as sildenafil and vardenafil. It blocks the enzyme that switches off the chemical signal responsible for relaxing blood vessels in the penis during arousal, so an erection is easier to achieve and keep. What makes tadalafil different from its relatives is its long half-life of about 17.5 hours. One dose can keep working for up to a day and a half, and food makes little difference to how it is absorbed.

Because Vidalista and Cialis contain the same drug at the same doses, you can expect the same timing, effects and precautions from both.

Two ways to take tadalafil

On demand

The usual starting dose is 10 mg, taken at least 30 minutes before sex. Depending on the response, a doctor may increase it to 20 mg or reduce it to 5 mg. The maximum is one dose a day, and many people find they do not need it every day. Vidalista 20 mg and Vidalista 10 mg match these on-demand doses.

Once daily

Low-dose tadalafil (2.5 mg or 5 mg) taken at the same time every day keeps a steady level in the body, so there is no need to plan ahead. This suits men who expect to have sex at least twice a week, and the 5 mg daily dose is also licensed for urinary symptoms caused by an enlarged prostate. Vidalista 5 mg and Vidalista 2.5 mg correspond to these daily strengths. Do not add an on-demand dose on top of a daily dose.

What is actually different?

Licensing

Cialis and licensed generic tadalafil in the US, UK and EU have been assessed by regulators such as the FDA, MHRA and EMA. Vidalista is made and sold under Indian regulation but is not licensed in those markets, so it has not been through their independent quality and bioequivalence checks.

Strengths above the maximum

The licensed maximum for ED is 20 mg in 24 hours. Vidalista 40, 60 and 80 mg exceed that. Tadalafil 40 mg is used for pulmonary arterial hypertension, but only under specialist care and under a different brand; it is not an ED dose. Higher doses raise the risk of headache, back pain, dizziness and low blood pressure, and because tadalafil lingers for so long, those effects can last too.

Formats

Vidalista also comes as chewable tablets, such as Vidalista CT 20 mg, and sublingual “Professional” versions. They contain the same tadalafil dose; any difference in how quickly they work is small.

Price

Branded Cialis is the most expensive way to take tadalafil. Licensed generics have been available in the US and UK since 2017–2018 and cost much less, and Indian generics such as Vidalista are typically cheaper still.

Side effects

Headache, indigestion, flushing, a stuffy nose and dizziness are common with any PDE5 inhibitor. Tadalafil is more likely than sildenafil to cause back pain and aching muscles, usually starting 12–24 hours after a dose and settling within two days. Get urgent help for an erection lasting more than 4 hours, sudden loss of vision or hearing, or chest pain.

Who should not take Vidalista or Cialis

• Anyone taking nitrates or riociguat. If emergency nitrates are needed, at least 48 hours must pass after the last tadalafil dose.
• People with serious heart disease, a recent heart attack or stroke, or very low blood pressure.
• Those with severe kidney or liver impairment, unless a doctor sets a reduced dose.

Alpha-blockers, strong CYP3A4 inhibitors (such as ritonavir, ketoconazole or clarithromycin) and heavy drinking (five or more units) can all increase the risk of low blood pressure with tadalafil, so mention every medicine you take.

Vidalista or Cialis: which should you choose?

• For a licensed product, choose Cialis or a licensed generic tadalafil prescribed by your doctor.
• If price matters most, Indian generics such as Vidalista are widely used. Stay at 20 mg or below, take one dose a day at most, and never combine it with nitrates.
• If you want spontaneity, ask your doctor whether daily 2.5–5 mg dosing would suit you.

Not sure whether tadalafil or sildenafil is the better fit? Read our comparison of sildenafil vs tadalafil, or browse all strengths in our tadalafil range.

Frequently asked questions

Is Vidalista the same as Cialis?

Both contain tadalafil and work the same way. Vidalista is a different brand from a different manufacturer and is not licensed in the US, UK or EU.

Why is tadalafil called the weekend pill?

Because a single dose can help for up to 36 hours, covering a Friday evening to Saturday morning without another tablet.

Is Vidalista 40 mg twice as effective as 20 mg?

No. 20 mg is the licensed maximum for ED. Doubling the dose mainly doubles the side effects.

Can I drink alcohol with tadalafil?

A small amount is usually fine, but heavy drinking can cause dizziness and a drop in blood pressure.

This guide is general information, not medical advice. Tadalafil is a prescription medicine; check with a doctor that it is suitable before you take it.

Cenforce and Viagra are both erectile dysfunction (ED) tablets that contain the same active ingredient, sildenafil citrate. Viagra is the original brand made by Pfizer, while Cenforce is a generic version made in India by Centurion Laboratories. Because the medicine inside is the same, most of the differences come down to licensing, the strengths on offer, the formats available and price. This guide sets them side by side so you can have an informed conversation with your doctor.

Cenforce vs Viagra at a glance

The same medicine, working the same way

Sildenafil belongs to a group of medicines called PDE5 inhibitors. During sexual arousal, nitric oxide triggers a chemical messenger (cGMP) that relaxes the smooth muscle in the penis and lets blood flow in. PDE5 is the enzyme that breaks that messenger down. By blocking it, sildenafil helps an erection develop and last. It does not create desire and does nothing without stimulation.

Because the active ingredient is identical, a 100 mg Cenforce tablet is designed to deliver the same dose of sildenafil as a 100 mg Viagra tablet. The expected onset, duration, side effects and precautions are therefore the same for both.

What is actually different?

1. Licensing and quality checks

Viagra and licensed generic sildenafil sold in the US, UK and EU have been assessed by regulators such as the FDA, MHRA or EMA, including checks that generics release the drug in the same way as the original. Cenforce is manufactured and sold under Indian regulation, but it is not a licensed medicine in the US, UK or EU, so those regulators have not reviewed it. That does not mean it is ineffective, but it does mean the independent checks you would get with a licensed product are not there.

2. The strength range

The licensed maximum dose of sildenafil for ED is 100 mg once a day. Cenforce is also sold as 120, 150 and 200 mg tablets. These strengths go beyond what any major regulator has approved and increase the risk of side effects such as headaches, dizziness and low blood pressure without clear extra benefit. If a doctor has agreed that sildenafil is suitable for you, stay within 25–100 mg. Our range of Cenforce 100 mg, Cenforce 50 mg and Cenforce 25 mg covers the standard doses.

3. Formats

Beyond standard tablets, Cenforce comes in variations such as Cenforce Soft 100 mg, a chewable tablet some people find easier to take. These contain the same sildenafil dose. Claims that chewable or sublingual versions work dramatically faster are not well supported, and you should never combine formats or take more than one dose in 24 hours.

4. Price

Branded Viagra carries the cost of Pfizer’s original research and marketing. Generic sildenafil, whether a licensed generic or an Indian brand such as Cenforce, usually costs far less per tablet. In the US and UK, licensed generic sildenafil is now widely available with a prescription at a much lower price than the brand.

How to take sildenafil

• The usual starting dose is 50 mg, taken about an hour before sex. A doctor may raise it to 100 mg or lower it to 25 mg depending on effect and side effects.
• Take no more than one dose in 24 hours.
• A heavy, fatty meal can delay the effect, so a light meal works better.
• A lower starting dose (25 mg) is often advised for people over 65, those with liver problems or severe kidney disease, and anyone taking certain medicines that raise sildenafil levels, such as ritonavir or some antifungals.
• Alcohol in moderation is unlikely to be harmful, but heavy drinking makes erections harder and increases dizziness.

Side effects

The most common side effects are the same for both brands: headache, facial flushing, indigestion, a blocked or runny nose, dizziness and, occasionally, a temporary blue tinge or blurring of vision. Get urgent medical help if you have:

• an erection lasting more than 4 hours (priapism)
• sudden loss of vision in one or both eyes, or sudden hearing loss
• chest pain, fainting or an irregular heartbeat during or after sex

Who should not take Cenforce or Viagra

Do not take sildenafil if you use any nitrate medicine (such as nitroglycerin (glyceryl trinitrate) sprays or isosorbide tablets) or the lung medicine riociguat, because the combination can cause a dangerous drop in blood pressure. Sildenafil is also unsuitable for people who have been advised to avoid sexual activity because of heart problems, have had a recent heart attack or stroke, have very low blood pressure or have certain inherited eye conditions. If you take alpha-blockers for blood pressure or prostate symptoms, a doctor will usually start sildenafil at 25 mg.

Erectile dysfunction can be an early sign of heart disease, diabetes or hormone problems, so it is worth having a check-up rather than simply treating the symptom.

Cenforce or Viagra: which should you choose?

Clinically, both deliver sildenafil, so the choice is mostly practical:

• If regulatory approval matters most to you, choose Viagra or a licensed generic sildenafil prescribed by your doctor.
• If cost is the main concern, many people use Indian generics such as Cenforce. If you do, stick to the licensed strengths (25–100 mg), follow the dosing rules above, and never take it alongside nitrates.
• If sildenafil’s 4–5 hour window feels restrictive, a longer-acting medicine such as tadalafil may suit you better. Our guide to sildenafil vs tadalafil explains the differences.

You can compare every strength and format in our sildenafil range.

Frequently asked questions

Is Cenforce the same as Viagra?

It contains the same active ingredient, sildenafil citrate, and works in the same way. It is a different brand from a different manufacturer and is not licensed in the US, UK or EU.

Is Cenforce 200 mg stronger or better than 100 mg?

It contains twice the licensed maximum dose. Higher doses mainly increase side effects; they are not recommended.

Can I switch from Viagra to Cenforce?

If you already take Viagra without problems, the same dose of sildenafil should have a similar effect. Check with your doctor or pharmacist first, and never take both on the same day.

What is Cenforce FM?

Cenforce FM is marketed for women, but sildenafil is not approved for female sexual problems and the evidence that it helps is weak. Women with low desire or arousal difficulties should speak to a doctor about proven options.

This article is for general information only and is not a substitute for medical advice. Sildenafil is a prescription medicine; speak to a doctor before starting it.

Sildenafil and tadalafil are the two most widely prescribed medicines for erectile dysfunction (ED). Both belong to the same drug class and work in a similar way, yet they feel quite different in everyday use. One acts for a few hours, the other for up to a day and a half. This guide compares sildenafil vs tadalafil side by side so you can have a better-informed conversation with your doctor about which one suits your lifestyle.

How Sildenafil and Tadalafil Work

Both medicines are PDE5 inhibitors. During sexual arousal, the body releases nitric oxide, which relaxes the smooth muscle in the penis and lets more blood flow in. An enzyme called phosphodiesterase type 5 (PDE5) normally switches this process off. By blocking PDE5, sildenafil and tadalafil help the body maintain the blood flow needed for an erection.

An important point that many men do not realize: neither medicine causes an erection on its own. Sexual stimulation is still needed. They make a natural response easier, rather than creating one.

Sildenafil vs Tadalafil at a Glance

Sildenafil: Fast-Acting and Predictable

Sildenafil was the first PDE5 inhibitor and has more than 25 years of real-world use behind it. It is usually taken about an hour before sexual activity, and its effect lasts for several hours. Many men like that it has a clear, predictable window.

The main practical drawback is that a large or fatty meal can slow its absorption, so it tends to work best on a light stomach. Doctors commonly start at 50 mg and adjust up or down depending on response and side effects. The maximum is one dose in 24 hours.

Popular generic sildenafil brands include Fildena 100 mg, Cenforce 100 mg and Aurogra 100 mg. You can see all strengths in our sildenafil range.

Tadalafil: Long-Lasting and Flexible

Tadalafil’s biggest advantage is its long duration. A single as-needed dose can remain effective for up to 36 hours, which is why it earned the nickname “the weekend pill”. This removes much of the pressure of timing, and food has little effect on how well it works.

Tadalafil is also available as a low daily dose (2.5 mg or 5 mg) taken at the same time every day. This keeps a steady level in the body, so there is no need to plan around a tablet at all. The daily 5 mg dose is also used to relieve urinary symptoms caused by an enlarged prostate. This makes it a practical option for men who have both conditions.

Common generic tadalafil options include Vidalista 20 mg and Tadarise 20 mg for as-needed use, and Vidalista 5 mg for daily use. Browse our full tadalafil range.

What About Vardenafil and Avanafil?

Two other PDE5 inhibitors are also available:

• Vardenafil works much like sildenafil, lasting around 4–5 hours. Some men who don’t respond well to one medicine find another suits them better.
• Avanafil is the newest of the group and can start working in as little as 15–30 minutes, with fewer reported visual side effects.

Side Effects to Know About

Because both medicines widen blood vessels, they share similar common side effects. These are usually mild and short-lived:

• Headache
• Facial flushing
• Blocked or runny nose
• Indigestion or heartburn
• Dizziness

There are a few differences. Sildenafil is more likely to cause temporary visual changes, such as a blue tint or sensitivity to light. Tadalafil is more likely to cause back pain or muscle aches, which typically appear 12–24 hours after a dose.

Seek urgent medical help if you have an erection lasting more than 4 hours (priapism), sudden loss of vision or hearing, or chest pain during sexual activity.

Who Should Not Take Them

PDE5 inhibitors are not safe for everyone. Do not take sildenafil or tadalafil if you:

• Use nitrate medicines for chest pain (such as nitroglycerin/GTN spray or isosorbide) or recreational “poppers”. The combination can cause a dangerous drop in blood pressure.
• Take riociguat for pulmonary hypertension.
• Have been advised by a doctor to avoid sexual activity because of a heart condition.
• Have had a recent heart attack or stroke, or have very low blood pressure.

Extra caution is needed if you take alpha-blockers for blood pressure or prostate problems, certain antifungals or HIV medicines, or if you have liver or kidney disease. Never take two different ED medicines together. Limit alcohol, which can reduce effectiveness and increase dizziness. Grapefruit juice can raise drug levels in the blood.

Which One Should You Choose?

There is no single “best” ED medicine. Large studies show sildenafil and tadalafil are similarly effective, so the right choice mostly comes down to your routine and preferences:

• Choose sildenafil if you prefer a shorter-acting tablet taken shortly before planned activity, or you have used it successfully before.
• Choose tadalafil if you want more spontaneity, a longer window of effect, or also have enlarged-prostate symptoms.
• Consider daily tadalafil if you are sexually active several times a week and would rather not plan around a tablet.

Your doctor will consider your heart health, other medicines and any side effects you’ve had before recommending a medicine and dose.

Frequently Asked Questions

Can I take sildenafil and tadalafil together?

No. Combining PDE5 inhibitors increases the risk of low blood pressure and other side effects without improving results.

Is tadalafil stronger than sildenafil?

Not exactly. They are similarly effective at their recommended doses. Tadalafil simply lasts longer, which some men experience as “stronger”.

Do I need to take them every day?

Sildenafil and as-needed tadalafil (10–20 mg) are taken only before sexual activity. Low-dose tadalafil (2.5–5 mg) is the option designed for daily use.

Does ED always need medication?

Not always. ED can be an early sign of heart disease, diabetes or high blood pressure, and lifestyle changes such as exercise, weight loss, stopping smoking and drinking less can make a real difference. Read our guide to tips for managing erectile dysfunction for more.

This article is for general information only and is not a substitute for professional medical advice. Always speak to a doctor or pharmacist before starting, stopping or changing any medicine.