Adverse effects most commonly reported from Tadalafil are headache, flushing and dyspepsia. There may be visual disturbances, dizziness and nasal congestion. Other adverse effects reported include diarrhea, muscle pain, skin rashes and urinary or respiratory tract infections. Priapism has also occurred. There have also been reports of serious cardiovascular events, including sudden cardiac death, associated with the use of Tadalafil.