Levothyroxine and Montelukast: Can You Take Them Together?

Here's what FDA-approved drug labeling shows.

MILD

Interaction Found

Levothyroxine (thyroid medicine) and montelukast (asthma/allergy medicine) can be taken together safely. Studies show they don't interact in a way that requires dose changes. Your body processes both medicines normally when used together.

What to do: Continue taking both medicines as prescribed by your doctor. Tell your doctor about all medicines you take. If you notice any new symptoms or concerns, contact your doctor.

Source: FDA-approved drug labeling via openFDA

About These Medications

Levothyroxine — View full safety profile, side effects, and all known interactions.

Montelukast — View full safety profile, side effects, and all known interactions.

Other interactions with Levothyroxine

MODERATEmetforminMODERATEomeprazoleMODERATElosartanMODERATEwarfarinMODERATEpropranololMODERATEsertraline

Other interactions with Montelukast

MODERATEwarfarinMODERATElorazepamMODERATEclonazepamMILDprednisoneMILDalprazolam

Check interactions with other medications:

SafeCheck provides drug interaction information from FDA-approved product labeling (openFDA). This is for informational purposes only and is not medical advice. Always consult your healthcare provider before making medication decisions.