Fildena 150 mg (or any erectile dysfunction medication that contains Sildenafil Citrate, such as Viagra) for several reasons: Taking a high dose like 150 mg more frequently than prescribed can lead to an overdose of Sildenafil. This can cause dangerously low blood pressure, heart issues, or even fainting. Sildenafil affects the blood vessels, and taking too much can excessively lower blood pressure, especially if combined with medications like nitrates (often used for chest pain), alcohol, or drugs that also lower blood pressure. 3. Ensuring Effectiveness: Fildena 150 mg may not be more effective than lower doses like 50 mg or 100 mg for most men. In fact, higher doses can increase side effects without necessarily improving the effectiveness of the medication. The usual starting dose for most men is 50 mg, and your doctor may increase it to 100 mg based on how well it works and any side effects. 150 mg is typically not the first choice, and it may not provide any added benefit compared to lower doses. 4. Drug Interactions: High doses like Fildena 150 mg can also interact with other medications in a more pronounced way. If you're on medications for heart disease, high blood pressure, HIV treatments, or antifungals, the dosage of Sildenafil needs to be carefully adjusted. Following the proper dosage helps avoid potentially dangerous interactions that can affect your heart, liver, or kidneys. 5. Understanding Your Body’s Response: Everyone’s body reacts differently to medications. Starting with a lower dose (like 50 mg or 100 mg) allows your doctor to determine how well the medication works for you and whether any adjustments are needed.