Olvion (Sildenafil)

Sildenafil, the active ingredient in Olvion, is a phosphodiesterase type 5 (PDE5) inhibitor presented as a tablet for oral use. It treats erectile dysfunction in adult males. GNH USA supplies Olvion as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals and pharmacies worldwide.

GNH USA supplies Olvion as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals and pharmacies worldwide.

Sildenafil acts on the nitric‑oxide/cGMP pathway to facilitate erection in men with erectile dysfunction.

- Erectile dysfunction: improves ability to achieve and maintain an erection suitable for sexual activity. - Pulmonary arterial hypertension: lowers pulmonary arterial pressure and improves exercise capacity. - Secondary use in benign prostatic hyperplasia (off‑label): may relieve lower urinary tract symptoms associated with BPH.

Adverse reactions to sildenafil are reported across a range of severity.

Common Side Effects: - Headache: mild to moderate headache occurring shortly after dosing. - Flushing: warmth and redness, typically on the face or neck. - Dyspepsia: indigestion or upset stomach. - Nasal congestion: stuffy nose without infection. - Visual disturbances: blurred vision or changes in colour perception. - Myalgia: muscle aches, often in the back or limbs.

Serious or Rare Side Effects: - Priapism: prolonged erection lasting more than four hours, requiring urgent medical attention. - Sudden vision loss: abrupt loss of vision in one or both eyes (non‑arteritic anterior ischemic optic neuropathy). - Sudden hearing loss: unexplained decrease or loss of hearing. - Severe hypotension: marked drop in blood pressure, especially when combined with nitrates. - Cardiovascular events: chest pain, myocardial infarction, or stroke in high‑risk patients. - Allergic reactions: rash, itching, swelling, or anaphylaxis.

Before prescribing sildenafil, clinicians should assess patient history and comorbid conditions.

- Cardiovascular assessment: evaluate for recent myocardial infarction, unstable angina, or severe heart failure. - Nitrate use: avoid co‑administration with nitrates or nitric‑oxide donors. - Concomitant medications: review for drugs that may potentiate hypotensive effects. - Visual or auditory disorders: caution in patients with pre‑existing eye or ear conditions. - Renal or hepatic impairment: dose adjustment may be required based on organ function. - Store at below 25°C: keep in the original container, protect from moisture and direct sunlight.

Sildenafil may interact with several drug classes, altering its efficacy or safety profile.

Major Interactions (Avoid): - Nitrates: concurrent use can cause severe hypotension. - Guanylate cyclase stimulators: additive vasodilatory effect leading to dangerous blood pressure drops. - Certain antifungal agents (e.g., ketoconazole): increase sildenafil plasma concentrations.

Moderate Interactions (Monitor Closely): - Alpha‑blockers: may cause additive blood pressure reduction. - Antihypertensives: monitor for enhanced hypotensive response. - CYP3A4 inhibitors/inducers: may require dose adjustment based on plasma level changes.