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Erectile Dysfunction Treatment
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Tadalafil 20mg (Teva) 8 tablets Rear view of Tadalafil Teva Tablets (5mg, 10mg, 20mg)

Tadalafil Teva Tablets (5mg, 10mg, 20mg)

Tadalafil Teva Tablets (5mg, 10mg, 20mg) Product information

£19.99 (£2.50 per tablets)

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Teva Tadalafil is an effective treatment for erectile dysfunction. It’s a type of medication called a PDE-5 inhibitor and works by keeping the blood vessels in the muscles of the penis relaxed, so blood can flow through them and make it firm enough for sex if you’re feeling aroused (1).

The 5mg dose is also sometimes prescribed for a condition called Benign Prostatic Hyperplasia (BPH) which is caused by an enlarged prostate and causes issues like urinary incontinence. However, for the purpose of this page we’ll be talking about its use for erectile dysfunction (1).

Teva Tadalafil is known for its long-acting effectiveness, which can last up to 36 hours. Take daily for spontaneity in the bedroom, or as needed for planned sexual activity (2).

Product Information for Tadalafil Teva Tablets (5mg, 10mg, 20mg)

Buy Tadalafil Teva Online in the UK

The prescription-only medication, Tadalafil Teva is the generic of the popular branded version Cialis is a member of the class of drugs known as phosphodiesterase type 5 inhibitors. It is used to treat impotence (male impotence). It aids in achieving and maintaining an erection strong enough to support sexual activity. However, in order for Tadalafil to be fully effective, sexual stimulation is required.  

After taking this medication, it should start to work within 30 minutes and the effects can last up to 36 hours.

This medication is a genuine TEVA brand product sourced in the UK.

For more detailed information from the manufacturer of TEVA Tadalafil 20mg tablets please click here.

How does Teva Tadalafil work?

When you’re aroused, your body releases nitric oxide which then increases the levels of a chemical called cyclic GMP (cGMP). cGMP is responsible for relaxing the muscles in your penis so that blood can flow into them (3).

Tadalafil is a phosphodiesterase type 5 (PDE-5) inhibitor. It works by blocking the PDE-5 enzyme that usually breaks down cGMP and makes it difficult to get an erection. This allows cGMP to stay active for longer, keeping muscles relaxed and blood flow optimal during sexual activity (3).

However, it’s essential to note that Tadalafil will only work if you are sexually stimulated.

What is the difference between Teva Tadalafil daily and as needed options?

Tadalafil is available in different doses depending on how readily you want the treatment available.

The 5mg dose is often referred to as Tadalafil Daily. This is because it’s taken as one-a-day treatment every day, regardless of whether you plan to have sex that day. The aim is to build up enough Tadalafil in your body to be effective as and when you needed it, enabling greater spontaneity when it comes to your sex life (1).

The 10mg and 20mg doses of Tadalafil are often referred to as The Weekend Pill. This means that you take them only when you are planning on having sex imminently. It usually starts working within 30-60 minutes, with the effects lasting up to 36 hours. Most people start with the 10mg dose and move up to 20mg only if they are not achieving satisfactory results. Always speak to your prescriber before adjusting your dose (4).

Tadalafil Teva Tablets (5mg, 10mg, 20mg) reviews

How to use Tadalafil Teva Tablets (5mg, 10mg, 20mg)

It depends on if you choose to take Tadalafil as a daily or an as-needed treatment. In both cases, the tablet should be swallowed whole with water, and it can be taken with or without food.

For daily Teva Tadalafil, take the tablet at the same time every day to help you to remember to take it.

For as-needed Teva Tadalafil, take your tablet at least 30 minutes before intended sexual activity. However, since the effects usually last for up to 36 hours, you don’t need to time taking it exactly.

Do not take more than one dose in any 24-hour period, regardless of whether you’re using daily or as needed.

And remember, Tadalafil won’t work if you are not sexually aroused (1).

Medicines and conditions that interact with Teva Tadalafil

If you have any of the following medical conditions, you may not be a suitable candidate to take Teva Tadalafil (1):

  • A serious heart condition, or you have had a recent heart attack or stroke

  • Low blood pressure

  • Uncontrolled high blood pressure

  • Serious liver disease or kidney disease

  • Previous vision loss from poor blood flow to your eye (NAION)

  • Blood disorders such as sickle cell anaemia, leukaemia or multiple myeloma

  • Peyronie’s disease or other structural issues with your penis

  • Pulmonary veno-occlusive disease

  • A history of prolonged erections/erections lasting more than 4 hours

Please note that Teva Tadalafil contains lactose, so is unsuitable for anyone with a lactose intolerance, or anyone who is hypersensitive or allergic to any of the ingredients. You can find the complete ingredients list on the Patient Information Leaflet.

The following medications have known interactions with Teva Tadalafil which means that you may require additional monitoring or an alternative drug combination:

  • Any form of nitrate, because this can dangerously lower your blood pressure.

  • Riociguat; a medication for pulmonary hypertension or similar guanylate cyclase stimulators.

  • Alpha-blockers such as doxazosin and tamsulosin; which are usually prescribed to people who have an enlarged prostate, high blood pressure or some types of adrenal gland tumour.

  • Other antihypertensive medications; which are used to treat high blood pressure.

  • CYP3A4 inhibitors; used to treat fungal infections, HIV/AIDS and some heart conditions.

  • Other erectile dysfunction treatments

  • Vasoactive intrapenile injections

  • CYP3A4 inducers such as rifampicin/rifampin, which are prescribed to treat seizures, bacterial infections and some types of cancer

It’s also recommended to avoid drinking grapefruit juice because it’s been shown to slow down how quickly Tadalafil breaks down, potentially raising your Tadalafil levels and increasing your risk of side effects (1).

Drinking alcohol may also affect your ability to get an erection (1).

Storing Teva Tadalafil

  • Keep this medicine out of the sight and reach of children.

  • Store between 15ºC and 30ºC.

  • Store in the original package to protect from light and moisture.

  • Do not use this medicine after the expiry date which is stated on the label after EXP. The expiry date refers to the last day of that month.

Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment (1).

Side effects of Tadalafil Teva Tablets (5mg, 10mg, 20mg)

Like any medication, there is always a risk of side effects and complications from taking Teva Tadalafil.

Common side effects of Teva Tadalafil:

  • Headaches

  • Indigestion

  • Back pain

  • Pain in your arms and legs

  • Muscle aches

  • Nasal congestion

  • Facial flushing

Uncommon side effects of Teva Tadalafil:

  • Dizziness

  • Eye pain/blurred vision

  • Stomach pain

  • Nausea/vomiting

  • Reflux

  • Sudden changes in blood pressure

  • Heart palpitations (fast heartbeat)

  • Ringing in your ears

  • Prolonged erection

Seek immediate medical help if you experience any of the following:

  • Symptoms of an allergic reaction (skin rashes, swelling of your mouth, tongue or airways, breathing problems)

  • Chest pain

  • Priapism, which is the term used to describe a prolonged and often painful erection, usually lasting continuously for 4 hours or more

  • Sudden vision problems (1)

Patient Information Leaflet

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

Tadalafil Teva Tablets (5mg, 10mg, 20mg) - Patient Information Leaflet

References
  1. Brown & Burk UK Ltd. Tadalafil 5 mg film-coated tablets: patient information leaflet [Internet]. Petersfield (UK): Brown & Burk UK Ltd; 2023 Dec 26 [cited 2026 Jul 24]. Available from: https://www.medicines.org.uk/emc/files/pil.15261.pdf

  2. Young JM. Tadalafil Improved Erectile Function at Twenty-Four and Thirty-Six Hours After Dosing in Men With Erectile Dysfunction: US Trial. Journal of Andrology. 2005 May 1;26(3):310–8. [cited 2026 Jul 24] https://pubmed.ncbi.nlm.nih.gov/15866997/

  3. Burnett AL. The Role of Nitric Oxide in Erectile Dysfunction: Implications for Medical Therapy. The Journal of Clinical Hypertension [Internet]. 2006 Dec [cited 2026 July 24];8:53–62. Available from: https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1524-6175.2006.06026.x

  4. Teva Canada Limited. TEVA-TADALAFIL: product monograph [Internet]. Toronto (ON): Teva Canada Limited; 2017 Feb 1 [cited 2026 Jul 24]. Available from: https://pdf.hres.ca/dpd_pm/00037975.PDF

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Authored on February 10, 2026

Reviewed on February 10, 2026