Understanding Orlistat's Digestive Effects for Weight Loss
Does Orlistat Cause Constipation? The Facts
Constipation is not a commonly reported side effect of orlistat. Instead, most patients experience gastrointestinal effects related to unabsorbed fat, including oily stools, increased bowel movement frequency, and urgent need to open bowels. Orlistat works by blocking approximately one third of dietary fat absorption, and this unabsorbed fat passes naturally through the digestive system. If you're experiencing digestive changes while considering weight loss treatment, speak to a healthcare professional about whether orlistat may be suitable for you.
Common Digestive Side Effects of Orlistat
The most frequently reported side effects include oily or fatty stools, oily spotting, flatulence with discharge, and soft stools. These effects occur because blocked fat passes through the body undigested. Side effects can be significantly reduced by keeping dietary fat intake low - approximately 15g fat per meal. Our prescribers provide detailed dietary guidance alongside your prescription to help minimise these effects while supporting your weight management goals.
Orlistat Pricing and Treatment Options
EverydayMeds offers three prescription weight loss options. Generic orlistat 120mg starts from £15.20 for 2 weeks (42 capsules) with code EDM10, representing excellent value for clinically equivalent treatment. Branded Xenical 120mg is available from £19.35 for 2 weeks, containing the same active ingredient. For those preferring lower-strength treatment, Alli 60mg costs £26.09 for 4 weeks. All treatments require clinical assessment by our UK-licensed prescribers and work best alongside a reduced-calorie, lower-fat diet.
Online Clinical Assessment Process
Our streamlined process begins with an online health questionnaire covering your medical history, current medications, and weight management goals. A qualified UK prescriber reviews your information and determines treatment suitability. If appropriate, your prescription is issued and dispensed by our GPhC-registered pharmacy in Leicester. Next day delivery ensures rapid, discreet access to treatment without requiring a separate GP appointment. The prescription fee is included in our pricing, providing transparent, all-inclusive costs.
Managing Side Effects During Treatment
While constipation is uncommon with orlistat, other digestive effects can be managed through dietary adjustments. Keep each meal to approximately 15g fat content, spread evenly across three daily meals. High-fat meals significantly increase side effect likelihood. A daily multivitamin taken at bedtime is recommended as orlistat may reduce absorption of fat-soluble vitamins. If you experience any concerning digestive changes, consult your prescriber for personalised advice on managing treatment effectively.


