Feeling dizzy after taking Fildena 120 can happen because the medication works by relaxing blood vessels and increasing blood flow, which may slightly lower your blood pressure. This drop in blood pressure can lead to lightheadedness or dizziness, especially when standing up quickly or after consuming alcohol. Higher doses like 120 mg may increase the chances of this effect. To reduce dizziness, avoid sudden movements, limit alcohol intake, and stay well hydrated. If the dizziness is severe, persistent, or accompanied by other symptoms, it is important to seek medical advice promptly.