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Tadalafil (Teva)

Tadalafil (Teva)

  • 1. Ozempic®️-equivalent therapy now available for weight management
  • 2. Average weight loss of 17%, with 1 in 3 patients achieving over 20%
  • 3. May help reduce osteoarthritis-related pain
  • 4. Wegovy®️ is not expected to impact the effectiveness of oral contraceptives
  • 5. Supports cardiovascular risk reduction
  • 6. Over 22 million patients treated with semaglutide-based therapies since 2018

  • ✔️ Treats erectile dysfunction in adult men aged 18 and over
  • ✔️ Remains effective for up to 36 hours after a single dose
  • ✔️ Works within 30 minutes of taking the tablet
  • ✔️ Less affected by food and alcohol than some alternatives
  • ✔️ Contains 20mg tadalafil, the same ingredient as branded Cialis

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What Are Tadalafil 20mg Tablets Used For?

 

Erectile dysfunction (ED) is more common than many men realise — and it's nothing to be embarrassed about. Tadalafil 20mg tablets are a clinically established treatment for ED, helping men achieve and maintain an erection sufficient for sexual activity. Manufactured by Teva, one of the world's largest generic medicine producers, this tablet contains the same active ingredient as the branded treatment Cialis. You can explore a wider range of men's health products at our men's health collection if you're looking for additional support.

Tadalafil belongs to a class of medicines called phosphodiesterase type 5 (PDE5) inhibitors. It is licensed in the UK for the treatment of erectile dysfunction in adult men. Unlike some alternatives, it offers a notably long window of effectiveness — up to 36 hours — which many men find more convenient for their lifestyle.

 

How Does Tadalafil Teva Work in the Body?

 

Understanding how this medicine works can help you use it more confidently. Here's what happens after you take a tablet:

  • Sexual stimulation triggers the release of nitric oxide in the erectile tissue of the penis.
  • Nitric oxide activates an enzyme that produces cyclic guanosine monophosphate (cGMP), which relaxes smooth muscle and widens blood vessels.
  • Tadalafil inhibits PDE5, the enzyme that breaks down cGMP — so cGMP levels stay elevated for longer.
  • This sustained elevation allows increased blood flow into the penis, supporting an erection.
  • Crucially, the medicine only works in the presence of sexual stimulation — it does not cause an automatic erection.

The tablet is absorbed through the gastrointestinal tract and reaches peak plasma concentration in around two hours, though many men notice effects sooner. Food does not significantly affect how well tadalafil is absorbed, which makes it more flexible than some other ED treatments.

 

Who Is Tadalafil Teva Suitable For?

 

This medicine is intended for adult men aged 18 and over who experience erectile dysfunction. It may be appropriate if:

  • You have been diagnosed with erectile dysfunction by a healthcare professional.
  • You prefer a longer-acting option that doesn't require precise timing around sexual activity.
  • You have tried other ED treatments and found them less effective or poorly tolerated.
  • You do not have contraindications such as current nitrate use or severe cardiovascular disease.

It is not suitable for women or anyone under 18. Men with certain heart conditions, low blood pressure, or severe liver or kidney impairment should not use this medicine without specialist advice. Always complete an honest medical consultation before starting treatment.

 

How Does Tadalafil Teva Compare to Other ED Treatments?

 

Feature Tadalafil Teva 20mg Sildenafil 50mg
Active ingredient Tadalafil Sildenafil
Duration of action Up to 36 hours 4–6 hours
Effect of food on absorption Minimal impact High-fat meals may delay onset
Onset of action 30–60 minutes 30–60 minutes

 

How Should You Store Tadalafil Teva Tablets?

 

Store your tablets below 25°C in the original packaging, away from direct sunlight and moisture. Keep them out of the reach and sight of children at all times. Do not use the tablets after the expiry date printed on the pack — if in doubt, return unused medicines to your pharmacy for safe disposal. If you're managing other health conditions alongside ED, you might also find our vitamins and supplements collection useful for general wellbeing support.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Tadalafil Teva 20mg Tablets specifications
Treatment category Erectile dysfunction
Mechanism of action PDE5 inhibitor — increases cGMP, relaxes smooth muscle, improves penile blood flow
Effective Up to 36 hours after administration
Suitable for Adult men aged 18 and over with erectile dysfunction
Active ingredient Tadalafil 20mg
Pack sizes 4 tablets, 8 tablets (varies by supplier)
Strengths 20mg
UK classification Prescription Only Medicine (POM)
Drug class PDE5 inhibitor
Preparation Film-coated tablet
Route of administration Oral

Specifications of Tadalafil Teva 20mg Tablets

 

What Is Tadalafil Teva and What Is It Used For?

 

Tadalafil Teva 20mg is a prescription-only medicine used to treat erectile dysfunction (ED) in adult men. ED is defined as the persistent inability to achieve or maintain an erection firm enough for satisfactory sexual activity. It's a condition that affects millions of men in the UK across all age groups, and it can have both physical and psychological causes. Tadalafil — the active ingredient — is a well-studied PDE5 inhibitor that has been used clinically for over two decades.

This medicine is not an aphrodisiac and will not increase sexual desire. It works only when you are sexually stimulated. It is not indicated for use in women or children, and it is not a treatment for premature ejaculation or other sexual health conditions.

 

What Do You Need to Know Before Using Tadalafil Teva?

 

Before taking this medicine, it's essential to be aware of the following contraindications and warnings:

  • Do not take if you are currently using nitrates in any form (e.g. glyceryl trinitrate for chest pain) — the combination can cause a dangerous drop in blood pressure.
  • Do not take if you are using riociguat (for pulmonary hypertension).
  • Avoid if you have had a stroke, heart attack, or life-threatening arrhythmia within the past 6 months.
  • Do not use if you have severe liver impairment or end-stage renal disease requiring dialysis.
  • Not suitable if you have low blood pressure (hypotension) — below 90/50 mmHg.
  • Do not take if you have a history of non-arteritic anterior ischaemic optic neuropathy (NAION).
  • Avoid if you have been advised to avoid sexual activity for cardiac reasons.

Known drug interactions to be aware of include:

  • Alpha-blockers (e.g. tamsulosin) — may cause additive blood pressure lowering.
  • Antihypertensive medicines — increased risk of hypotension.
  • CYP3A4 inhibitors such as ketoconazole or ritonavir — may increase tadalafil plasma levels.
  • Alcohol — excessive consumption may worsen side effects such as dizziness and flushing.
  • Grapefruit juice — may affect how the medicine is metabolised.

 

How Should You Use Tadalafil Teva Correctly?

 

  1. Take one tablet orally with a glass of water.
  2. Swallow the tablet whole — do not crush, chew, or split it.
  3. Take approximately 30 minutes before anticipated sexual activity.
  4. Ensure sexual stimulation is present — the tablet will not work without it.
  5. Do not take more than one tablet within any 24-hour period.
Indication Age Group Dose Frequency
Erectile dysfunction (on demand) Adult men (18+) 10mg or 20mg Once per 24 hours, as needed
Erectile dysfunction (daily use) Adult men (18+) 2.5mg or 5mg Once daily (lower-strength formulations)
Not indicated Under 18 / Women

If you have mild to moderate kidney or liver problems, your doctor may recommend starting at a lower dose. Always follow the prescriber's instructions. For broader sexual health support, you may also wish to browse our condoms and sexual health collection.

 

What Are the Possible Side Effects of Tadalafil Teva?

 

Like all medicines, tadalafil can cause side effects, though not everyone experiences them. Knowing what to look out for helps you manage your treatment safely.

Common side effects (may affect up to 1 in 10 people):

  • Headache
  • Facial flushing (redness and warmth)
  • Indigestion or stomach discomfort
  • Back pain
  • Nasal congestion
  • Muscle aches

Less common side effects (may affect up to 1 in 100 people):

  • Dizziness
  • Blurred vision
  • Increased heart rate (tachycardia)
  • Hypotension (low blood pressure)
  • Swelling of the eyelids
  • Eye pain or redness

Seek emergency medical attention immediately if you experience a prolonged erection lasting more than 4 hours (priapism), sudden loss of vision in one or both eyes, or sudden hearing loss. These are rare but serious effects that require urgent care.

 

How Should You Store Tadalafil Teva Tablets Safely?

 

  • Store below 25°C.
  • Keep in the original blister packaging to protect from moisture.
  • Do not store in the bathroom or near a sink.
  • Keep out of the reach and sight of children.
  • Do not use after the expiry date printed on the pack.
  • Return unused or expired tablets to your local pharmacy — do not dispose of them in household waste or down the sink.

If you're managing your overall health alongside ED treatment, our pain relief collection is available for any associated discomfort you may experience.

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Tadalafil Teva 20mg tablets online in the UK?

You can buy Tadalafil Teva 20mg tablets online from Cured Pharmacy, a GPhC-registered UK online pharmacy. Because tadalafil is a prescription-only medicine, you'll need to complete a short online consultation before your order is dispensed. This ensures the treatment is clinically appropriate for you and that your safety is protected throughout the process.

How does tadalafil 20mg work in the body?

Tadalafil works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which is found in the smooth muscle of the penis. By blocking PDE5, tadalafil allows cyclic GMP levels to remain elevated, relaxing blood vessel walls and increasing blood flow to the erectile tissue during sexual stimulation. It's important to understand that sexual arousal is still required — the tablet does not produce an erection on its own.

How do I take Tadalafil Teva 20mg step by step?

Swallow one 20mg tablet whole with a glass of water, approximately 30 minutes before you plan to have sex. You do not need to take it with food, though avoiding excessive alcohol is advisable. Never take more than one tablet within a 24-hour period, and always follow the instructions provided by your prescriber.

What is the best time to take tadalafil 20mg tablets?

Take tadalafil 20mg around 30 minutes before anticipated sexual activity for best results. One of the key advantages of tadalafil over other ED treatments is its long duration — it can remain effective for up to 36 hours after a single dose. This means you have a much wider window of opportunity compared to shorter-acting alternatives, which many men find reduces performance pressure.

What are the side effects of Tadalafil Teva 20mg and how do I manage them?

The most commonly reported side effects include headache, facial flushing, indigestion, back pain, and nasal congestion. Most of these are mild and tend to resolve on their own within a few hours. Staying well hydrated, avoiding alcohol, and taking the tablet with a light meal can help reduce the likelihood of indigestion and flushing. If side effects are persistent or severe, speak to your pharmacist or GP.

Who is eligible to use Tadalafil Teva 20mg tablets?

Tadalafil Teva 20mg is suitable for adult men aged 18 and over who have been diagnosed with erectile dysfunction. It is not appropriate for men currently taking nitrates, those with severe cardiovascular disease, or those with significant liver or kidney impairment. Women and anyone under 18 should not use this medicine. A medical consultation is required to confirm suitability before dispensing.

What happens if I miss a dose of tadalafil?

Because tadalafil 20mg is taken on demand rather than on a fixed daily schedule, a missed dose works differently to regular daily medicines. Simply take it when you need it, as long as you haven't already taken a dose within the past 24 hours. Never double up to compensate — taking two doses within 24 hours increases the risk of side effects, particularly low blood pressure.

How does tadalafil compare to sildenafil for erectile dysfunction?

Both tadalafil and sildenafil are PDE5 inhibitors used to treat erectile dysfunction, and both are clinically effective. The main practical difference is duration: tadalafil lasts up to 36 hours, while sildenafil typically works for 4–6 hours. Tadalafil is also less affected by food and alcohol intake, making it more flexible for many men. The right choice depends on your lifestyle, frequency of use, and how your body responds — your prescriber can help you decide. You can also explore our men's health collection for further options.

Can I drink alcohol while taking Tadalafil Teva 20mg?

Moderate alcohol consumption is unlikely to cause a significant problem, but drinking heavily while taking tadalafil is not advisable. Alcohol can lower blood pressure, and combining it with tadalafil may increase the risk of dizziness, flushing, and headache. To get the most from your treatment and minimise side effects, it's sensible to keep alcohol intake to a minimum on the day you take the tablet.

Is tadalafil safe to take with blood pressure medicines?

Tadalafil can interact with antihypertensive medicines and alpha-blockers, potentially causing an additive blood pressure-lowering effect that may lead to dizziness or fainting. If you take any medicines for high blood pressure or an enlarged prostate, you must inform your prescriber before starting tadalafil. Your doctor or pharmacist can advise on whether the combination is safe and whether any dose adjustments are needed.

How long does it take for tadalafil 20mg to start working?

Most men notice the effects of tadalafil within 30 to 60 minutes of taking the tablet, though it can take up to two hours to reach peak plasma concentration. Taking it on an empty stomach or with a light meal may help it work a little faster. Remember, sexual stimulation is still necessary — the medicine enhances the body's natural response rather than replacing it.

Can I use tadalafil every day?

Daily use of tadalafil is possible, but it requires a lower-strength formulation — typically 2.5mg or 5mg — rather than the 20mg on-demand tablet. Daily dosing is sometimes preferred by men who have sex more than twice a week or who want to avoid planning around a tablet. The 20mg dose is intended for on-demand use only, and should not be taken more than once in 24 hours. Speak to your prescriber about which approach suits you best.

What are the alternatives to Tadalafil Teva 20mg?

Other licensed treatments for erectile dysfunction in the UK include sildenafil (the generic form of Viagra), vardenafil, and avanafil — all of which are PDE5 inhibitors. Each has a slightly different onset time, duration, and side effect profile. Non-pharmacological approaches such as psychosexual therapy, lifestyle changes, and vacuum erection devices may also be appropriate depending on the underlying cause of ED. Your GP or prescriber can help identify the most suitable option for your circumstances. You can also browse our condoms and sexual health collection for complementary products.

How long can you keep taking tadalafil 20mg?

There is no fixed maximum duration for tadalafil use — many men take it safely over the long term under medical supervision. However, it's worth reviewing your treatment periodically with your GP, particularly if your underlying health changes or if you start new medicines. Erectile dysfunction can sometimes improve with lifestyle changes such as weight loss, increased physical activity, and stopping smoking, which may reduce your reliance on medication over time.

What does the latest research say about tadalafil for erectile dysfunction?

Tadalafil has been extensively studied since its initial approval and continues to be supported by a strong body of clinical evidence. Research consistently shows it is effective across a broad range of men with ED, including those with diabetes, cardiovascular disease, and post-prostatectomy ED. Ongoing studies are also exploring its role in other conditions such as benign prostatic hyperplasia (BPH) and pulmonary arterial hypertension, where it is already licensed at different doses. Your prescriber can discuss the most current guidance relevant to your situation.

How Should You Use Tadalafil Teva 20mg Tablets?

Taking tadalafil correctly gives you the best chance of it working well and reduces the risk of side effects. Always follow the instructions given by your prescriber, and read the patient information leaflet supplied with your pack before you start treatment.

What Is the Correct Dose of Tadalafil Teva?

The standard on-demand dose for most adult men is 10mg, which may be increased to 20mg if the lower dose is not sufficiently effective. Your prescriber will advise on the most appropriate dose based on your individual health profile, including any kidney or liver conditions that may require a dose reduction.

When Is the Best Time to Use Tadalafil Teva?

Take your tablet around 30 minutes before you anticipate sexual activity. Because tadalafil remains active in the body for up to 36 hours, you have a generous window — there's no need to time things too precisely, which many men find takes the pressure off. You can take it with or without food, though a heavy, high-fat meal may slightly delay the onset of action.

Avoid taking the tablet late at night if you are prone to low blood pressure upon waking, and try to keep alcohol consumption low on the day you take it.

How Long Can You Use Tadalafil Teva For?

There is no set maximum treatment duration for tadalafil when used as directed under medical supervision. Many men use it safely over months or years. That said, it's good practice to review your treatment with your GP periodically — particularly if your health changes, you start new medicines, or your ED improves with lifestyle modifications such as weight management or stopping smoking.

If you find the medicine is becoming less effective over time, speak to your prescriber rather than increasing the dose yourself.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Side Effects of Tadalafil Teva 20mg?

Most men who take tadalafil tolerate it well, but like all medicines it can cause side effects in some people. Common side effects — those affecting up to 1 in 10 users — are generally mild and short-lived, often resolving within a few hours without any treatment.

  • Headache
  • Facial flushing (a feeling of warmth or redness in the face)
  • Indigestion or stomach discomfort
  • Back pain
  • Nasal congestion or a runny nose
  • Muscle aches

What Are the Less Common Side Effects of Tadalafil Teva?

Less common side effects affect fewer than 1 in 100 people. They are worth being aware of, particularly if you have underlying cardiovascular or eye conditions. If any of the following occur and are troublesome, contact your GP or pharmacist.

  • Dizziness or light-headedness
  • Blurred vision or changes in colour perception
  • Increased heart rate (tachycardia)
  • Low blood pressure (hypotension)
  • Swelling of the eyelids
  • Eye redness or pain
  • Nosebleeds
  • Skin rash

What Are the Serious Side Effects of Tadalafil Teva?

Serious side effects are rare but require immediate medical attention. Do not ignore these symptoms or wait to see if they resolve on their own — call 999 or go to your nearest A&E department if you experience any of the following:

  • A prolonged erection lasting more than 4 hours (priapism) — this can cause permanent damage to the penis if not treated promptly.
  • Sudden loss of vision in one or both eyes — this may indicate non-arteritic anterior ischaemic optic neuropathy (NAION).
  • Sudden decrease or loss of hearing, sometimes accompanied by ringing in the ears (tinnitus) or dizziness.
  • Chest pain, particularly during or after sexual activity — this may indicate a cardiac event.
  • Severe allergic reaction (anaphylaxis) — symptoms include swelling of the face, lips, tongue, or throat, difficulty breathing, or a widespread skin rash.

What Should You Do If You Experience Side Effects of Tadalafil?

For mild side effects such as headache or flushing, staying well hydrated and resting usually helps. Avoiding alcohol and heavy meals on the day you take the tablet can also reduce the likelihood of these effects occurring. If side effects are persistent, worsening, or affecting your quality of life, speak to your prescriber — they may recommend a lower dose or an alternative treatment.

You can also report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk. This helps improve medicine safety for everyone.

Can Tadalafil Interact With Other Medicines?

Yes — tadalafil has several clinically significant interactions that you must be aware of before starting treatment. The most important is with nitrates (such as glyceryl trinitrate used for angina): combining these with tadalafil can cause a severe and potentially life-threatening drop in blood pressure. Alpha-blockers used for high blood pressure or an enlarged prostate can have a similar additive effect. Medicines that inhibit the liver enzyme CYP3A4 — including certain antifungals, HIV protease inhibitors, and some antibiotics — can raise tadalafil levels in the blood, increasing the risk of side effects. Always give your prescriber and pharmacist a full list of all medicines, supplements, and herbal remedies you are taking before starting tadalafil.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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