Sildenafil citrate is the active component in Brand Viagra, responsible for its effects. It works by inhibiting an enzyme called phosphodiesterase-5 (PDE5).
This inhibition increases blood flow to the penis, facilitating an erection when sexually stimulated. Importantly, sildenafil citrate does not cause erections without sexual stimulation.
The recommended starting dose is 50mg, taken as needed, about one hour before sexual activity. Your doctor may adjust this dose based on your individual response and health conditions.
Common side effects can include headache, facial flushing, and nasal congestion. More serious side effects are rare but require immediate medical attention. Consult your doctor before taking Sildenafil Citrate, especially if you have heart problems, low blood pressure, or take other medications.
| 25mg | Mild to moderate increase in blood flow | Mild headache, flushing |
| 50mg | Moderate to significant increase in blood flow | Headache, flushing, nasal congestion |
| 100mg | Significant increase in blood flow (may not be more effective than 50mg for all individuals) | Increased risk of side effects, including more severe headache, vision changes |
Always follow your doctor’s instructions regarding dosage and frequency. Do not exceed the recommended dose.


