Drug interactions
Cholecalciferol + Orlistat
Severity: Moderate
Cholecalciferol and Orlistat: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Orlistat blocks dietary fat digestion and thereby reduces absorption of fat-soluble vitamins, including vitamin D. Long-term use can lower vitamin D levels.
What this interaction means in plain words
Cholecalciferol and Orlistat can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Cholecalciferol belongs to Musculoskeletal; Orlistat belongs to Miscellaneous.
Why it happens
Inhibition of gastrointestinal lipases reduces fat absorption and micellar solubilization of fat-soluble vitamins.
What to do
Take vitamin D at least 2 hours before or after orlistat, for example at bedtime. Monitor 25-hydroxyvitamin D levels and adjust the dose as needed.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Cholecalciferol
- Cholecalciferol + Digoxin Major
- Aluminum hydroxide + Cholecalciferol Moderate
- Calcium acetate + Cholecalciferol Moderate
- Calcium Carbonate + Cholecalciferol Moderate
- Calcium chloride + Cholecalciferol Moderate
- Calcium citrate + Cholecalciferol Moderate
Other interactions of Orlistat
- Cyclosporine + Orlistat Major
- Cyclosporin + Orlistat Major
- Orlistat + Triheptanoin Major
- Amiodarone + Orlistat Moderate
- Beta carotene + Orlistat Moderate
- Carbamazepine + Orlistat Moderate
Frequently asked questions
Can I take Cholecalciferol with Orlistat?
MediHelp rates the interaction as moderate. Cholecalciferol and Orlistat can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Orlistat blocks dietary fat digestion and thereby reduces absorption of fat-soluble vitamins, including vitamin D. Long-term use can lower vitamin D levels.
How serious is the interaction between Cholecalciferol and Orlistat?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Take vitamin D at least 2 hours before or after orlistat, for example at bedtime. Monitor 25-hydroxyvitamin D levels and adjust the dose as needed.
What other medicines interact with Cholecalciferol?
MediHelp also lists interactions of Cholecalciferol with, for example, Digoxin, Aluminum hydroxide, Calcium acetate. The full list is on the Cholecalciferol page.
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