Drug Interactions with Oseltamivir

Introduction to Oseltamivir Interactions

The Centers for Disease Control and Prevention recommends that oseltamivir has minimal drug interaction risk because it is primarily excreted unchanged via the kidneys through glomerular filtration and tubular secretion via the anionic pathway 1, 2, 3
The Centers for Disease Control and Prevention notes that the only documented clinically significant interaction involves probenecid, which reduces oseltamivir carboxylate clearance by approximately 50% and doubles plasma levels through competition for renal tubular secretion 1, 2, 4, 3

The Centers for Disease Control and Prevention states that oseltamivir does not undergo significant hepatic metabolism and is not metabolized by cytochrome P450 enzymes, eliminating the most common pathway for drug-drug interactions 1, 2, 3
The American Academy of Pediatrics recommends administering oseltamivir with food to minimize gastrointestinal side effects (nausea, vomiting), which are the most common adverse events 5, 6

The American Academy of Pediatrics suggests initiating oseltamivir within 48 hours of symptom onset for maximum influenza treatment benefit, regardless of concomitant cough/cold medication use 11
The Centers for Disease Control and Prevention advises that package inserts should be consulted for the most detailed drug interaction information, though guidelines consistently note limited clinical data available for oseltamivir interactions 1, 2, 4, 3