Sildenafil (brand: Suhagra 100 mg) is a prescription medicine, and it should be prescribed based on effectiveness, tolerance, and medical safety factors. Typical prescription guidance for Suhagra 100 mg: Doctors usually follow this pattern: Starting dose (most patients): 50 mg as needed If 50 mg is insufficient: may increase to 100 mg If side effects occur or patient is older/has liver issues: may reduce to 25 mg How it is taken: 1 tablet only when needed Take 30–60 minutes before sexual activity Maximum: 1 dose in 24 hours Works best on an empty Suhagra 100 mg or after a light meal When doctors avoid or adjust it: A doctor may change or avoid prescribing it if there is: Use of nitrate medicines (for chest pain) — dangerous interaction Severe heart disease or recent heart attack/stroke Very low blood pressure Severe liver or kidney disease Certain eye conditions (rare) Important prescribing principle: Even though 100 mg exists, it is not automatically the starting dose. Doctors usually: Start lower ? assess response ? then adjust upward if needed If you want, I can compare Suhagra 100 mg vs Fildena 120 mg vs Tadarise 10 mg so you can understand which situations each one is actually used for.