Can You Take grapefruit and tretinoin Together?
Evidence-based clinical pharmacological assessment, adverse synergy evaluation, and administration separation protocols.
Co-administering grapefruit and tretinoin has documented pharmacodynamic or pharmacokinetic antagonism capable of triggering acute clinical harm. Do not combine without explicit specialist oversight.
Clinical Mechanism & Evidence Details
Additive potassium retention risks hyperkalemia, which can lead to life-threatening cardiac dysrhythmias.
Inhibits intestinal CYP3A4-mediated first-pass metabolism, elevating systemic drug concentrations and increasing toxic adverse effect risks.
Alcohol may enhance gastrointestinal irritation, trigger orthostatic hypotension, or alter drug absorption kinetics.
Alcohol may enhance gastrointestinal irritation, trigger orthostatic hypotension, or alter drug absorption kinetics.
Your doctor may instruct you to follow a low-salt or a diet high in potassium or calcium. Your doctor may also prescribe or recommend a calcium or potassium supplement. Follow these directions carefully.
Taking other supplements, foods, or medications with this pair?
Add your morning coffee, daily multivitamins, prescription pills, and dinner foods into our instant browser-based radar to check for multi-way chain reactions.
Clinical mechanism and interaction severity derived from openFDA Drug Structured Product Labeling (Section 7), NIH Office of Dietary Supplements (ODS), and NIH NCCIH clinical botanicals database.