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Phenylephrine and Levothyroxine: Moderate Interaction - Drugvu

🏠›Phenylephrine›Interaction with Levothyroxine

Phenylephrine + Levothyroxine

Drug interaction

Moderate interaction

A moderate drug-drug interaction between Phenylephrine and Levothyroxine is recorded in public interaction data. Severity reflects the source classification; it does not describe your individual risk. Do not start, stop, or change either medicine based on this page.

What “moderate” means

A moderate interaction can matter in some people. The combination is sometimes used, but usually with caution - monitoring, timing changes, or dose adjustments.

What to do

Mention this combination to your pharmacist or prescriber. Do not stop either medicine without advice.

Side effects reported for both

Phenylephrine and Levothyroxine are each reported to cause the effects below. Taking them together can make these more likely or more pronounced - one of the ways a drug interaction matters.

FatigueHeadacheNauseaPainDiarrhoeaDyspnoeaArthralgiaDizziness

Compiled from public adverse-event reports; an overlap, not a confirmed causal mechanism.

The two medicines

Active ingredient

Phenylephrine

Adrenergic and Dopaminergic Agents

Uses, side effects, dosage →· 152 recorded interactions

Active ingredient

Levothyroxine

Uses, side effects, dosage →· 626 recorded interactions

Source

DDInter 2.0 (CC-BY 4.0, https://ddinter.scbdd.com)

This is not medical advice. Drugvu is an independent aggregator of public records.