Drug interactions between Celexa and ritonavir
| Results for the following 2 drugs: |
|---|
| Celexa (citalopram) |
| ritonavir |
Interactions between your selected drugs
ritonavir ↔ citalopram
Applies to:ritonavir and Celexa (citalopram)
Coadministration with inhibitors of CYP450 3A4 is not expected to significantly affect the pharmacokinetics of citalopram or escitalopram, both of which are partially metabolized by the isoenzyme. Administration of racemic citalopram (40 mg) in combination with the potent CYP450 3A4 inhibitor ketoconazole (200 mg) decreased the ketoconazole peak plasma concentration (Cmax) by 21% and systemic exposure (AUC) by 10%, but did not significantly affect the pharmacokinetics of citalopram. Likewise, coadministration of a single 20 mg dose of escitalopram with a single 600 mg dose of ritonavir, another potent CYP450 3A4 inhibitor, did not affect the pharmacokinetics of either drug. Because citalopram and escitalopram are both metabolized by multiple isoenzymes (CYP450 2C19, 3A4, and 2D6), inhibition of a single isoenzyme may not appreciably decrease their clearance.
See also...
Drug Interaction Classification
The classifications below are a guideline only. The relevance of a particular drug interaction to a specific patient is difficult to determine using this tool alone given the large number of variables that may apply.
| Major | Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. |
| Moderate | Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. |
| Minor | Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. |
Do not stop taking any medications without consulting your healthcare provider.
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