Sildenafil BNF Information: What You Need to Know
Understanding Sildenafil in the BNF
The British National Formulary (BNF) lists sildenafil as a phosphodiesterase type-5 inhibitor used for erectile dysfunction. Whether prescribed as generic sildenafil or branded Viagra, both medications contain identical active ingredients and follow the same BNF prescribing guidelines. The key difference lies in cost and manufacturer, not clinical effectiveness.
Generic Sildenafil vs Branded Viagra
Generic sildenafil contains exactly the same active ingredient as Viagra - sildenafil citrate. Both work by increasing blood flow to the penis when sexually aroused, typically taking effect within 30-60 minutes. The BNF recognises both formulations as clinically equivalent, meaning you can expect the same results regardless of which option you choose.
The main advantage of generic sildenafil is cost-effectiveness. Since generic manufacturers don't need to recoup research and development costs, they can offer the same medication at significantly lower prices. This makes treatment more accessible whilst maintaining identical therapeutic benefits.
BNF Dosage Guidelines
According to BNF guidance, both sildenafil and Viagra are available in 25mg, 50mg, and 100mg tablets. The typical starting dose is 50mg, taken approximately one hour before sexual activity. Your prescriber may adjust this to 25mg or 100mg based on effectiveness and how well you tolerate the medication.
The BNF emphasises taking no more than one dose per 24-hour period. Food, particularly fatty meals, may delay the onset of action, so timing your dose appropriately can optimise effectiveness.
Safety Considerations from BNF
The BNF outlines important safety information that applies to both generic and branded formulations. Sildenafil should not be taken with nitrate medications (such as GTN spray) due to dangerous blood pressure interactions. Men with severe heart disease, recent stroke, or very low blood pressure may not be suitable candidates.
Before prescribing either option, healthcare providers must assess cardiovascular health, current medications, and medical history as outlined in BNF guidelines. This ensures safe and appropriate treatment for each individual.
Making Your Choice at EverydayMeds
EverydayMeds provides both generic sildenafil and branded Viagra options during the checkout process. After completing our clinical assessment with a UK-licensed prescriber, you can choose between:
Generic sildenafil - offering excellent value for money whilst maintaining the same therapeutic effects. Many men find this option preferable due to significant cost savings without compromising on quality or effectiveness.
Branded Viagra - providing the reassurance of the original formulation for those who prefer branded medications. Some patients feel more confident with the familiar Viagra branding, despite identical active ingredients.
Both options follow strict UK manufacturing standards and BNF guidelines. Your choice often comes down to personal preference and budget considerations rather than any difference in clinical outcomes.












