Fildena Professional 100 mg, which contains sildenafil citrate, can cause headaches as a common side effect. This is typical of all sildenafil-based medications, including Viagra Why Does Fildena Professional Cause Headaches? Sildenafil works by inhibiting the enzyme PDE5, leading to increased blood flow to the ***** during ***** arousal. However, this effect can also cause blood vessels in the head to dilate, leading to headaches in some individuals. Approximately 25% of patients using sildenafil experience headaches PubMed  Other Common Side Effects In addition to headaches, users of Fildena Professional may experience: Flushing Nasal congestion Dizziness Indigestion Visual disturbances (e.g., blurred vision or sensitivity to light) Back pain Diarrhea Sleep disturbances GenericDay Managing and Preventing Headaches To reduce the likelihood or severity of headaches: Stay Hydrated: Drink plenty of water before and after taking the medication. Avoid High-Fat Meals: Consuming fatty foods can delay the onset of action and may exacerbate side effects. Limit Alcohol Consumption: Alcohol can increase the risk of side effects and may interact with the medication. Consider Lower Doses: If headaches persist, consult your healthcare provider about adjusting the dosage. Over-the-Counter Pain Relief: Medications like ibuprofen may help alleviate headaches, but consult your doctor before combining them with sildenafil  When to Consult a Doctor If you experience: Persistent or severe headaches Visual disturbances Chest pain or irregular heartbeat Prolonged erection (lasting more than 4 hours) Seek immediate medical attention.