Mensil Med Max (Sildenafil Citrate)

Sildenafil citrate belongs to the phosphodiesterase type 5 inhibitor class and is used to manage conditions related to vascular smooth‑muscle relaxation.

• Erectile dysfunction: improves ability to achieve and maintain an erection suitable for sexual activity.
• Pulmonary arterial hypertension: lowers pulmonary arterial pressure and enhances exercise capacity.
• Acute mountain sickness prophylaxis: reduces the incidence and severity of symptoms at high altitude.

• Sildenafil citrate selectively inhibits the enzyme phosphodiesterase type 5 (PDE5), preventing the breakdown of cyclic guanosine monophosphate (cGMP) in smooth‑muscle cells. Elevated cGMP leads to relaxation of the corpus cavernosum and pulmonary vascular smooth muscle, increasing blood flow and facilitating erection or reducing pulmonary arterial pressure.

Adverse reactions may vary in frequency and severity.

Common Side Effects

• Headache: mild to moderate pain often occurring shortly after dosing.
• Flushing: warmth and redness of the face or upper body.
• Dyspepsia: indigestion or upset stomach.
• Nasal congestion: stuffy or runny nose.
• Visual disturbances: blurred vision or altered colour perception.
• Back pain: muscle aches, typically in the lower back.

Serious or Rare Side Effects

• Priapism: prolonged erection lasting more than four hours, requiring urgent medical attention.
• Sudden hearing loss: unexplained decrease or loss of hearing.
• Severe hypotension: marked drop in blood pressure, especially with nitrates.
• Myocardial infarction: heart attack symptoms in at‑risk individuals.
• Stroke: neurological deficits indicating cerebrovascular event.
• Anaphylaxis: severe allergic reaction with rash, swelling, and breathing difficulty.

Before initiating therapy, clinicians should evaluate patient‑specific risk factors and comorbidities.

• Cardiovascular assessment: ensure the patient can tolerate sexual activity without undue risk.
• Nitrate use: avoid co‑administration with any nitrate medication.
• Liver or kidney impairment: consider dose adjustment or monitoring.
• Ocular health: use caution in patients with retinal disorders or vision loss.
• Storage: keep at ambient temperature below 25 °C, retain in original packaging, and protect from moisture and light.

Sildenafil citrate can interact with several drug classes, requiring careful management.

Major Interactions (Avoid)

• Nitrates (e.g., nitroglycerin): may cause severe hypotension.
• Guanylate cyclase stimulators (e.g., riociguat): risk of additive blood‑pressure lowering.
• Potent CYP3A4 inhibitors (e.g., ketoconazole, itraconazole): increase sildenafil exposure.

Moderate Interactions (Monitor Closely)

• Alpha‑blockers (e.g., doxazosin): may cause additive blood‑pressure effects.
• CYP3A4 inducers (e.g., rifampin): may reduce sildenafil effectiveness.