@esdras
Filitra 20 has a duration of action of about 4 to 5 hours. This timeframe allows for an adequate period of sexual activity without the need for frequent dosing. Common side effects of Filitra 20 may include headache, flushing, nasal congestion, indigestion, and dizziness. Serious side effects such as priapism (prolonged erection lasting more than 4 hours) are rare but require immediate medical attention.