Silagra contains Sildenafil as its active component. Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction (ED). Silagra is supplied as a pill in a 100 mg strength. In Hong Kong, sildenafil-containing medicines are prescription-only products regulated by the Hong Kong Department of Health under the Pharmacy and Poisons Ordinance.
Sildenafil belongs to the PDE5 inhibitor class. In the penis, sexual stimulation releases nitric oxide, which activates an enzyme that raises cyclic guanosine monophosphate (cGMP). cGMP relaxes smooth muscle in the corpora cavernosa, allowing increased blood flow and erection. PDE5 normally breaks down cGMP; sildenafil blocks this enzyme, prolonging cGMP activity and enhancing the natural erection response. Effects typically begin within 30-60 minutes, peak at about 1 hour, and last up to 4-5 hours. Oral bioavailability is around 40 %, and the drug is metabolised primarily by the liver enzyme CYP3A4.
Sildenafil is approved by health authorities worldwide, including Hong Kong, for the treatment of erectile dysfunction in adult men. It is indicated for men who have difficulty achieving or maintaining an erection sufficient for satisfactory sexual activity. The medication is not approved for use in women, children, or for any purpose other than ED unless specifically prescribed for an off-label indication.
Sildenafil is also approved in some jurisdictions for pulmonary arterial hypertension (under the brand name Revatio). While Silagra is marketed for ED, clinicians may prescribe sildenafil off-label for pulmonary hypertension after careful evaluation.
Disclaimer: Off-label use requires medical supervision and individualized risk assessment. It is not approved by the Hong Kong Department of Health for pulmonary hypertension.
Ideal candidates
Absolute contraindications
Relative contraindications
Special populations
These effects are usually mild, transient, and resolve without medical intervention.
Seek immediate medical attention if any of these occur.
This article provides educational information about Silagra and is not a substitute for professional medical advice. Treatment decisions, including use for unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.
Moderate alcohol consumption may increase the risk of dizziness and hypotension, potentially reducing the effectiveness of the medication. It is advisable to limit alcohol intake when using Silagra.
Yes. A high-fat meal can delay the absorption of sildenafil, leading to a slower onset of action. Taking the pill on an empty stomach provides more predictable results.
Silagra tablets are typically round, film-coated, and imprinted with the brand name and strength (e.g., “Silagra 100 mg”). Exact appearance may vary by manufacturer.
Standard drug-screening panels do not test for sildenafil. However, specialized tests can detect it if specifically requested.
Yes, provided you carry a valid prescription from a Hong Kong-licensed practitioner and keep the medication in its original packaging. Some countries may require additional documentation, so check local regulations before travel.
Silagra (sildenafil) has a shorter duration of action (≈ 4-5 hours) compared to tadalafil, which can last up to 36 hours. The onset of effect is similar, but dosing frequency and timing preferences differ.
Sildenafil is generally safe for diabetic patients, but diabetes can affect vascular health and may influence the medication’s effectiveness. Blood glucose control should be optimised, and any cardiovascular concerns discussed with a physician.
After radical prostatectomy, sexual function may be impaired. Sildenafil can be prescribed to aid recovery of erectile function, but this should be evaluated by a urologist on a case-by-case basis.
If you miss a dose, simply wait until the next appropriate time to use the medication. Do not take a double dose to compensate for a missed one.
Store the medication at room temperature and discard it after the expiration date printed on the packaging. Typically, tablets remain stable for 2-3 years if stored correctly.
