Sildenafil BNF Information and Clinical Overview
What is Sildenafil According to BNF Guidelines?
Sildenafil is classified in the BNF (British National Formulary) as a phosphodiesterase type-5 (PDE5) inhibitor used for treating erectile dysfunction. The medication works by increasing blood flow to the penis during sexual arousal, helping men achieve and maintain erections suitable for sexual activity. Sildenafil requires sexual stimulation to be effective and does not cause automatic erections.
Available Forms and Dosage Options
According to BNF guidance, sildenafil is available in 25mg, 50mg, and 100mg tablet strengths. The typical starting dose is 50mg, taken approximately one hour before sexual activity. Depending on effectiveness and tolerability, the dose may be adjusted to 25mg (if side effects occur) or increased to 100mg (if 50mg proves insufficient). Only one dose should be taken within a 24-hour period.
Branded vs Generic Options
EverydayMeds offers both sildenafil (generic) and Viagra (branded) formulations. Both contain the same active ingredient - sildenafil citrate - and work identically. The choice between generic and branded options often depends on patient preference and cost considerations. Both require the same clinical assessment and prescription process.
Eligibility and Assessment Requirements
BNF guidelines specify that sildenafil should only be prescribed to adult men following appropriate clinical assessment. This evaluation considers cardiovascular health, current medications, and medical history. Men with certain heart conditions, those taking nitrate medications, or with severe liver problems may not be suitable candidates for treatment.
Important Contraindications
The BNF lists several absolute contraindications for sildenafil use. These include concurrent use of nitrate medications (such as GTN spray), recent heart attack or stroke (within six months), severe heart disease, very low blood pressure, and severe liver impairment. Additionally, men taking riociguat for pulmonary hypertension should not use sildenafil.
Drug Interactions and Safety
Sildenafil can interact with various medications, particularly those affecting blood pressure. Alpha-blockers, some antifungal medications, and certain antibiotics may require dose adjustments or contraindicate sildenafil use entirely. The combination with nitrates is particularly dangerous and can cause life-threatening drops in blood pressure.
Common Side Effects
BNF documentation indicates that sildenafil may cause headaches, facial flushing, indigestion, nasal congestion, and dizziness. These effects are typically mild and temporary. More serious side effects, while rare, include prolonged erections lasting over four hours (priapism) and sudden vision or hearing changes, which require immediate medical attention.
Getting Sildenafil Through EverydayMeds
EverydayMeds provides convenient access to both sildenafil and Viagra following online consultation with UK-licensed prescribers. The assessment ensures treatment safety and appropriateness while maintaining confidentiality. Patients can choose between generic sildenafil or branded Viagra at checkout, with both options delivered discreetly to UK addresses.
