Always inform your doctor about all medications you’re taking, including over-the-counter drugs and supplements, before starting Xenical. Orlistat can interact with certain medications, affecting their absorption. This includes blood thinners like warfarin, cyclosporine (an immunosuppressant), levothyroxine (a thyroid hormone), and some diabetes medications.
Medication Interactions
- Warfarin: Orlistat may reduce warfarin’s effectiveness, increasing bleeding risk. Close monitoring of your INR (International Normalized Ratio) is necessary. Cyclosporine: Concurrent use can lower cyclosporine blood levels, potentially reducing its effectiveness. Regular blood tests are needed. Levothyroxine: Orlistat can decrease levothyroxine absorption. Take these medications at least four hours apart. Diabetes Medications: Orlistat might decrease the absorption of some diabetes medications, potentially leading to high blood sugar. Monitor your blood glucose levels closely.
If you experience unexpected side effects, contact your doctor immediately.
Dietary Recommendations
To maximize the benefits and minimize side effects of Xenical, follow a balanced, low-fat diet. This means limiting your daily fat intake to roughly 30% of total calories.
Fat Intake Guidelines
Choose lean protein sources: Chicken breast, fish, beans. Select low-fat dairy products: Skim milk, low-fat yogurt. Consume fruits and vegetables liberally: These are naturally low in fat. Limit saturated and trans fats: Reduce consumption of red meat, fried foods, and processed snacks. Read food labels carefully: Pay close attention to fat content per serving.
Remember, consistent adherence to a healthy diet and lifestyle, alongside medical supervision, is crucial for achieving and maintaining weight loss goals. Consult your doctor or a registered dietitian for personalized dietary advice tailored to your needs and health status.


