Side effects and important safety information
Possible effects include headache, indigestion, flushing, nasal congestion, back pain, and muscle aches.
Do not take tadalafil with nitrates, including nitroglycerin or isosorbide, recreational nitrites known as poppers, or riociguat. These combinations can cause dangerous drops in blood pressure.
If chest pain occurs during sexual activity, stop and seek emergency care. Tell responders when you last took tadalafil; do not self-administer a nitrate.
Seek emergency care for an erection lasting 4 hours or longer, severe allergic symptoms, or collapse. Stop taking tadalafil and seek immediate medical attention for sudden vision or hearing loss.
Tell your provider about heart disease, low blood pressure, kidney or liver problems, and all medications. Alpha-blockers, blood-pressure medicines, certain antifungal or antiviral medicines, and substantial alcohol intake need review. Do not use if sexual activity has been judged unsafe for your heart.
This is not a complete safety list. Read the pharmacy's medication information.