What is Tadalafil: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Tadalafil overview

BRAND NAMES:

  • Cialis, Adcirca, Alyq

Generic Names:

  • Tadalafil

Uses:

  • Treats erectile dysfunction and the symptoms of benign prostatic hyperplasia (enlarged prostate). Also treats pulmonary arterial hypertension (high blood pressure in the lungs) to improve your exercise ability.

Therapeutic Classes:

  • Antihypertensive, Erectile Dysfunction Agent

Forms:

  • Tablet

How it’s taken:

  • By mouth

What is Tadalafil used for?

What form(s) does Tadalafil come in

  • Tablet

What are common Tadalafil doses?

  • Tablet 2.5MG

  • Tablet 5MG

  • Tablet 10MG

  • Tablet 20MG

  • Box 30 Tablets

  • Box 15 Tablets

  • Bottle 30 Tablets

  • Bottle 1GM of

  • Bottle 5GM of

  • Disp Pack 15 Tablets

Common Tadalafil prescriptions

  • Tadalafil
    30 tablets bottle

  • Tadalafil
    15 tablets box

  • Tadalafil
    30 tablets box

  • Tadalafil
    15 tablets disp pack

  • Tadalafil
    10mg tablet

  • Tadalafil
    2.5mg tablet

  • Tadalafil
    20mg tablet

  • Tadalafil
    5mg tablet

How to take Tadalafil

  • Only take tadalafil with a prescription and under the care of a healthcare provider. Take the medicine as directed by a healthcare provider.

  • Swallow the tablet whole. Do not crush or chew it.

  • Do not take more than one dose per day or split the dose into two daily doses.

  • For daily use, the tadalafil dose should be taken at the same time each day.

  • Carefully read and follow the patient information brochure that comes with the prescription.

  • For erectile dysfunction, sexual activity can be initiated any time after taking tadalafil.

  • For erectile dysfunction, sexual stimulation is required for an erection.

  • Drinking alcohol within 36 hours of a tadalafil dose may lower blood pressure, so alcohol use is best avoided. 

  • If too much tadalafil is taken, seek immediate medical advice. 

  • Always check the expiration date. If the expiration date has passed, dispose of the medication safely and get a new prescription.

  • Tadalafil should be stored at room temperature. Check the patient information brochure for the ideal temperature range.

What to do if you miss a dose of Tadalafil

Tadalafil contraindications

  • This medicine is not right for everyone. Do not use it if you had an allergic reaction to tadalafil.

Tadalafil warnings

  • Sudden decrease in hearing or hearing loss, ringing in the ears, dizziness

  • Sudden loss of vision

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

  • This medicine may cause the following problems: Low blood pressure (especially if taken with other medicines that lower blood pressure)Painful or prolonged erectionHearing or vision problems

  • Tell any doctor who treats you that you are using tadalafil.

  • Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, lung or breathing problems, diabetes, high cholesterol, cancer (including leukemia, multiple myeloma), sickle cell anemia, bleeding problems, stomach ulcer, problems with your penis, or eye problems. Tell your doctor if you have angina or chest pain during sex, heart disease, heart rhythm problems, high or low blood pressure, or a history of heart attack or stroke. Also tell your doctor if you smoke or drink alcohol.

Tadalafil interactions

  • Do not eat grapefruit or drink grapefruit juice while you are using this medicine.

  • Some foods and medicines can affect how tadalafil works. Tell your doctor if you are using any of the following:Bosentan, carbamazepine, erythromycin, indinavir, itraconazole, ketoconazole, phenobarbital, phenytoin, rifampin, ritonavirBlood pressure medicine (including alfuzosin, amlodipine, bendroflumethiazide, candesartan, doxazosin, enalapril, losartan, metoprolol, tamsulosin, terazosin)Medicine to treat prostate problems

  • Do not use this medicine if you are also taking riociguat or a nitrate medicine. You may use a nitrate medicine at least 48 hours after your last dose of tadalafil. Do not take other medicines that contain tadalafil or similar medicines, including sildenafil or vardenafil.

  • Do not have 5 or more alcohol-containing drinks in a short period of time while you are using this medicine.

Tadalafil side effects

Serious Side Effects

  • Sudden loss of vision

  • Painful erection or an erection that lasts longer than 4 hours with or without pain

  • Lightheadedness, fainting

  • Chest pain, trouble breathing

  • Blistering, peeling, or red skin rash

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Sudden decrease in hearing or hearing loss, ringing in the ears, dizziness

Less Serious Side Effects

  • Headache

  • Warmth or redness in your face, neck, arms, or upper chest

  • Stuffy or runny nose

  • Upset stomach, nausea

  • Back or muscle pain

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