Drug interactions
Gliclazide + Olanzapine
Severity: Moderate
Gliclazide and Olanzapine: 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
Olanzapine is associated with weight gain, insulin resistance and hyperglycemia, and can substantially worsen glycemic control in diabetic patients. Higher gliclazide doses or additional agents may be needed.
What this interaction means in plain words
Gliclazide and Olanzapine 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.
Gliclazide belongs to Endocrine; Olanzapine belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism through induced insulin resistance and impaired insulin secretion.
What to do
Monitor blood glucose and HbA1c regularly after starting olanzapine and adjust the antidiabetic regimen. Consider a more metabolically neutral antipsychotic if control deteriorates.
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 Gliclazide
Other interactions of Olanzapine
Frequently asked questions
Can I take Gliclazide with Olanzapine?
MediHelp rates the interaction as moderate. Gliclazide and Olanzapine 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. Olanzapine is associated with weight gain, insulin resistance and hyperglycemia, and can substantially worsen glycemic control in diabetic patients. Higher gliclazide doses or additional agents may be needed.
How serious is the interaction between Gliclazide and Olanzapine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood glucose and HbA1c regularly after starting olanzapine and adjust the antidiabetic regimen. Consider a more metabolically neutral antipsychotic if control deteriorates.
What other medicines interact with Gliclazide?
MediHelp also lists interactions of Gliclazide with, for example, Ciprofloxacin, Clarithromycin, Disopyramide. The full list is on the Gliclazide page.
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