medication timing
4 interactions related to medication timing
levothyroxine + iron
Iron reduces levothyroxine absorption by up to 65%
levothyroxineironabsorptionabsorption interactionsupplement timingmedication timingthyroid medicationhypothyroidismTSHferrous sulfate
levothyroxine + magnesium
Magnesium can reduce levothyroxine absorption
levothyroxinemagnesiumabsorptionabsorption interactiondrug supplement interactionsupplement timingmedication timingTSHthyroid medicationantacids
St. John's Wort + SSRI
St. John's Wort induces cytochrome P450 enzymes and P-glycoprotein, reducing plasma concentrations of SSRIs and increasing the risk of serotonin syndrome when combined due to additive serotonergic effects.
st. john's wortssridrug interactiondrug supplement interactionsupplement interactionsupplement interactionsmedication timingabsorption
antibiotics + probiotics
Antibiotics kill probiotic bacteria, reducing their effectiveness
antibioticsprobioticssupplement timingdrug supplement interactionabsorptionmedication timingciprofloxacindoxycycline