Understanding Orlistat Side Effects - Private Assessment
Does Orlistat Cause Constipation? What You Need to Know
Constipation is not commonly reported as a side effect of orlistat. In fact, orlistat typically causes the opposite - increased bowel movements and loose, oily stools. This occurs because orlistat blocks approximately one third of dietary fat absorption, with unabsorbed fat passing through the digestive system. The most common gastrointestinal side effects include oily or fatty stools, urgent bowel movements, and increased frequency of bowel movements. If you're experiencing constipation while considering orlistat, this needs individual assessment by a qualified prescriber.
Private Prescription Route - Faster Access Without NHS Delays
Our private prescription service eliminates NHS waiting times. Complete an online clinical assessment reviewed by UK-licensed prescribers within 24 hours. Generic orlistat 120mg costs £32.99 for 4 weeks (£29.69 with EDM10), while branded Xenical costs £42.99 (£38.69 with EDM10). Alli 60mg is available for £28.99 per 4-week supply (£26.09 with EDM10). All prescriptions include comprehensive guidance on managing side effects and optimising treatment outcomes.
Managing Digestive Effects with Expert Support
Our prescribers provide detailed guidance on minimising orlistat's gastrointestinal effects. Keeping dietary fat intake to approximately 15g per meal significantly reduces side effects. Most digestive effects are mild and decrease as your body adapts to a lower-fat diet. If you experience unusual symptoms like constipation, this requires individual evaluation. Our private service ensures you receive personalised advice without GP appointment delays.
Complete Orlistat Range Available Privately
Choose from three options: generic orlistat 120mg (most cost-effective), branded Xenical 120mg (same active ingredient), or Alli 60mg (lower strength). All contain the same orlistat active ingredient that works by inhibiting lipase enzymes in the gut. Treatment must be combined with a reduced-calorie, lower-fat diet and regular physical activity. Private prescriptions include treatment monitoring and ongoing support.
Next Day Delivery from GPhC-Registered Pharmacy
All medications are dispensed by our Leicester-based, GPhC-registered pharmacy using MHRA-regulated supply chains. Next day delivery available across the UK in discreet packaging. No separate GP appointments needed - prescription costs are included. Use code EDM10 for 10% off every order, available to new and returning customers. Start your private consultation today.


