Like all medicines, this medicine can cause side effects, although not everybody gets them. These effects are normally mild to moderate in nature.
- Allergic reactions including rashes (frequency uncommon).
- Chest pain - do not use nitrates but seek immediate medical assistance (frequency uncommon).
- Priapism, a prolonged and possibly painful erection after taking Tadalafil (frequency rare). If you have such an erection, which lasts continuously for more than 4 hours you should contact a doctor immediately.
- Sudden loss of vision (frequency rare), distorted, dimmed, blurred central vision or sudden decrease of vision (frequency not known).
Other side effects have been reported:
Common (may affect 1 to 10 in every 100 people)
Headache, back pain, muscle aches, pain in arms and legs, facial flushing, nasal congestion and indigestion.
Uncommon (may affect 1 to 10 in every 1,000 people)
Dizziness, stomach ache, feeling sick, being sick (vomiting), reflux, blurred vision, eye pain, difficulty in breathing, presence of blood in urine, prolonged erection, pounding heartbeat sensation, a fast heart rate, high blood pressure, low blood pressure, nose bleeds ringing in the ears, swelling of the hands, feet or ankles and feeling tired.
Rare (may affect 1 to 10 in every 10,000 people)
Fainting, seizures and passing memory loss, swelling of the eyelids, red eyes, sudden decrease or loss of hearing, hives (itchy red welts on the surface of the skin), penile bleeding, presence of blood in semen and increased sweating.
Heart attack and stroke have also been reported rarely in men taking Tadalafil.
Most of these men had known heart problems before taking this medicine.
Partial, temporary, or permanent decrease or loss of vision in one or both eyes has been rarely reported.
Some additional rare side effects have been reported in men taking Tadalafil that were not seen in clinical trials. These include:
- Migraine, swelling of the face, serious allergic reaction which causes swelling of the face or throat, serious skin rashes, some disorders affecting blood flow to the eyes, irregular heartbeats, angina and sudden cardiac death.
- Distorted, dimmed, blurred central vision or sudden decrease of vision (frequency not known).
The side effect dizziness has been reported more frequently in men over 75 years of age taking Tadalafil. Diarrhoea has been reported more frequently in men over 65 years of age taking Tadalafil.