Vidalista 2.5 mg contains tadalafil, which is a phosphodiesterase type 5 (PDE5) inhibitor. This drug works by increasing blood flow to the penis, helping men with erectile dysfunction (ED) achieve and maintain an erection in response to sexual stimulation. However, there are some situations where the medication may cause prolonged erections, a condition known as priapism. Prolonged erections can occur under the following circumstances: Excessive dosage: While Vidalista 2.5 mg is generally considered a low dose, taking more than the prescribed amount can increase the risk of side effects, including priapism. A higher dose, such as Vidalista 10 mg or 20 mg, may cause prolonged erections in some men if not properly managed. Interaction with other medications: Taking Vidalista 2.5 mg alongside other drugs that affect blood flow (such as nitrates or certain alpha-blockers) can increase the risk of side effects, including priapism. Always inform your doctor about any medications you are taking. Underlying health conditions: Certain conditions, such as sickle cell anemia, leukemia, or multiple myeloma, can increase the likelihood of priapism when taking erectile dysfunction medications. If you have any of these conditions, you should use Vidalista (or any similar medication) with caution and under strict medical supervision. Allergic reactions: Though rare, allergic reactions to tadalafil or other components of Vidalista could cause abnormal side effects, including priapism. If you experience any unusual symptoms, seek medical attention immediately. What to do if you experience a prolonged erection: If you have an erection lasting more than 4 hours, it's considered a medical emergency, and you should seek immediate medical help to avoid long-term damage to the penis.