Fildena 25 Mg contains sildenafil 25 mg, a PDE-5 inhibitor used for erectile dysfunction (ED). Its compatibility with other medicines depends on the specific drugs you are taking and your overall health condition. Medicines that should not be combined with Fildena 25 Mg Nitrates (avoid completely) Medicines such as nitroglycerin or isosorbide used for chest pain can interact with sildenafil and may cause a dangerous drop in blood pressure. Other ED medicines Avoid combining Fildena 25 Mg with other PDE-5 inhibitors such as tadalafil, vardenafil, or avanafil unless a doctor specifically advises it. Medicines that may require caution Alpha-blockers Medicines used for high blood pressure or prostate problems may increase the risk of dizziness or low blood pressure when combined with sildenafil. Blood pressure medicines Some antihypertensive drugs may enhance blood-pressure-lowering effects. Certain antifungal or antibiotic medicines Drugs that affect sildenafil metabolism (such as some strong CYP3A4 inhibitors) may increase sildenafil levels and side effects. HIV medications Some protease inhibitors can affect how sildenafil is processed in the body and may require dose adjustments. Food and alcohol considerations A heavy or high-fat meal may delay how quickly Fildena 25 Mg starts working. Excessive alcohol may increase dizziness and may make achieving an erection more difficult. Before using Fildena 25 Mg, inform your healthcare provider about all prescription medicines, over-the-counter drugs, and supplements you take. This helps determine whether the dose is appropriate and safe for you.