Orlistat vs Xenical vs Alli: Which Should You Buy?
Generic Orlistat vs Branded Xenical: The Key Differences
Both orlistat 120mg and Xenical 120mg contain identical active ingredients at the same dose, making them clinically equivalent. The primary difference lies in cost and branding. Generic orlistat offers the same fat-blocking mechanism at a significantly lower price point, while Xenical represents the original branded version manufactured by Roche.
Price comparison shows substantial savings with generic orlistat. A 4-week supply costs £29.69 with EDM10 compared to Xenical at £38.69 - saving you £9 monthly. Over a 12-week treatment course, choosing orlistat over Xenical saves £29.70 with our discount code.
How All Three Options Work
Whether you choose orlistat, Xenical, or Alli, the mechanism remains the same. Each works by inhibiting lipase enzymes in your digestive system, blocking approximately one third of dietary fat from being absorbed. This unabsorbed fat passes naturally through your body, potentially supporting weight management when used alongside a reduced-calorie, lower-fat diet.
The 120mg prescription strength (orlistat and Xenical) blocks more dietary fat than 60mg Alli, but requires clinical assessment and prescriber approval. Alli at half-strength may produce milder gastrointestinal side effects while still contributing to your weight management programme.
Treatment Costs and Value Comparison
Our pricing structure rewards longer treatment courses across all options. Orlistat 120mg ranges from £15.20 (2-week supply) to £86.39 (12-week supply) with EDM10. Xenical pricing starts at £19.35, reaching £116.09 for 12 weeks. Alli costs £26.09 for 4 weeks up to £116.99 for 12 weeks with discount applied.
Many patients prefer generic orlistat for its cost-effectiveness without compromising clinical outcomes. Others choose Xenical for brand preference, while Alli appeals to those seeking a gentler starting point at lower strength.
Prescription Process and Eligibility
Both orlistat and Xenical require prescription following online clinical assessment by UK-licensed prescribers. Our process involves completing a health questionnaire covering your medical history, current medications, and BMI information. Treatment may be suitable for adults with BMI of 30 or above, or 28+ with weight-related health conditions like type 2 diabetes or high blood pressure.
The online consultation replaces traditional GP appointments, providing faster access to treatment. All prescriptions are reviewed individually, with treatment approved only where clinically appropriate for your circumstances.
Managing Side Effects Across All Options
Gastrointestinal side effects remain the most common experience with all orlistat medicines, directly linked to dietary fat intake. Keeping meals to approximately 15g fat each significantly reduces oily stools, urgent bowel movements, and anal leakage. The 60mg Alli typically produces milder effects than 120mg prescription options.
These effects indicate the medicine is working - blocking dietary fat absorption. Most patients find side effects decrease over time as diet adapts to lower fat intake patterns.


