Why Understanding the Mechanism Matters for Your Purchase
How Orlistat's Fat-Blocking Mechanism Works
Orlistat works through a targeted mechanism that inhibits pancreatic and gastric lipases - enzymes responsible for breaking down dietary fats. When you take an orlistat 120mg capsule with a meal, it blocks approximately one third of the fat you consume from being digested and absorbed. This unabsorbed fat passes naturally through your digestive system, effectively reducing your calorie intake from dietary fat.
Generic orlistat 120mg capsules cost from £15.20 per fortnight (with EDM10), whilst branded Xenical 120mg is available from £19.35 per fortnight. Both contain identical active ingredients and work through the same proven mechanism.
Why This Mechanism Makes Orlistat Effective
The lipase inhibition mechanism provides several advantages for weight management. Unlike stimulant-based medications that act on the brain, orlistat works locally in your gut and isn't significantly absorbed into your bloodstream. This localised action means the fat-blocking effect is directly related to what you eat - consuming lower-fat meals results in fewer side effects whilst maintaining the weight management benefits.
Clinical studies demonstrate that this mechanism, when combined with a reduced-calorie lower-fat diet, can support meaningful weight loss. The fact that orlistat blocks approximately one third (not all) dietary fat means you maintain essential fat-soluble vitamin absorption whilst reducing excess calorie intake.
Orlistat vs Xenical: Same Mechanism, Different Prices
Both generic orlistat 120mg and branded Xenical 120mg work through identical mechanisms - they contain the same active ingredient at the same dose. The fat-blocking effect is clinically equivalent, with the key difference being cost. Our 4-week supplies demonstrate this:
Generic orlistat 84 capsules: £29.69 (with EDM10)
Xenical 84 capsules: £38.69 (with EDM10)
Monthly saving with generic: £9.00
For longer treatment periods, these savings become more significant. A 12-week supply of generic orlistat costs £86.39 compared to £116.09 for Xenical - a £29.70 saving whilst receiving identical fat-blocking benefits.
How the Mechanism Translates to Real Results
Understanding orlistat's mechanism helps explain why dietary compliance is crucial. The medication blocks approximately one third of fat from each meal, so consuming high-fat meals (over 15g fat per meal) leads to more unabsorbed fat and increased gastrointestinal effects. Patients who maintain lower-fat meals typically experience better tolerance whilst maximising the weight management benefits.
The mechanism also explains why orlistat should be taken with each main meal containing fat. If you skip a meal or eat a fat-free meal, you can omit that dose since there's no dietary fat for the medication to block.
Getting Started with Orlistat Through EverydayMeds
Now you understand how orlistat's fat-blocking mechanism works, you can make an informed treatment choice. Our online clinical assessment allows UK-licensed prescribers to review your suitability for orlistat 120mg or Xenical 120mg. Following prescriber approval, we'll dispense your medication from our GPhC-registered Leicester pharmacy with next-day delivery across the UK.
Use code EDM10 for 10% off your first order, reducing costs to just £15.20 for a 2-week starter supply of generic orlistat. Start your weight management journey with confidence in the proven fat-blocking mechanism of orlistat.


