Interactions with Other Medications and Supplements

Always inform your doctor and pharmacist about all medications, vitamins, and supplements you take, including over-the-counter drugs. This includes herbal remedies and dietary supplements. Some medications can affect how Synthroid is absorbed or metabolized, altering its effectiveness.

Common Interactions

Certain medications, such as antacids containing calcium or aluminum, iron supplements, and cholestyramine, can reduce Synthroid absorption. To minimize this interaction, take Synthroid at least four hours before or after these medications. Similarly, soy products and some foods high in fiber can also affect absorption. Maintain consistent timing and spacing between Synthroid and these substances.

Some medications, like amiodarone and certain antidepressants, can increase the effect of Synthroid in your body, potentially leading to an overactive thyroid. Your doctor might need to adjust your Synthroid dosage if you start or stop taking these medications.

If you are considering taking any new medication or supplement, consult your doctor. They can help you assess potential interactions and make adjustments to your treatment plan to ensure your safety and the optimal effectiveness of your Synthroid.