Tadalafil is used for:

Treating high blood pressure in the lungs (pulmonary arterial hypertension [PAH]. It may also be used for other conditions as determined by your doctor.

Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor. It works by relaxing and dilating the vessels in the lungs. This lowers the blood pressure in the lungs and helps to improve your ability to exercise.

How should I take tadalafil?

Take tadalafil exactly as it was prescribed for you. Do not take it in larger doses or for longer than recommended by your doctor. Taking this medication in larger doses will not make it more effective, and could cause dangerous side effects.

Tadalafil can be taken with or without food.

Tadalafil is usually taken only when needed, just before sexual activity. However, tadalafil may also be taken daily (at a lower dose), regardless of when sexual activity is planned. Follow your doctor's instructions.

Tadalafil can help achieve an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor's instructions.
Do not take tadalafil more than once a day. Allow 24 hours to pass between doses. If you take the medication daily, take it at the same time each day. Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis. Store this medication at room temperature away from moisture and heat.

What happens if I miss a dose?

Since tadalafil is used as needed, you are not likely to be on a dosing schedule.
If you take tadalafil every day and you miss a dose, take the missed dose as soon as you remember. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention if you think you have used too much of this medicine.
Overdose symptoms may include chest pain, nausea, irregular heartbeat, and feeling light-headed or fainting.

What should I avoid while taking tadalafil?

Avoid drinking alcohol, which can increase some of the side effects of tadalafil.
Grapefruit and grapefruit juice may interact with tadalafil. Discuss the use of grapefruit products with your doctor. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.
Avoid using other medicines to treat impotence, such as alprostadil (Caverject, Muse, Edex) or yohimbine (Yocon, Yodoxin, others), without first talking to your doctor.

Tadalafil Dosing Information

Usual Adult Dose for Erectile Dysfunction:

Tadalafil 20 mg is the correct dosage

Tadalafil takes remains active in the body for between 24 - 36 hours. The maximum recommended dosing frequency is once per day in most patients.

Where can I get more information?

Your pharmacist can provide more information about tadalafil.