Synthroid, like all medications, can cause side effects. While many experience no issues, be aware of potential problems and report them to your doctor immediately.
Common Side Effects
- Headache Changes in heart rate (faster or slower) Weight changes (gain or loss) Changes in menstrual periods Muscle weakness or cramps Tremors or nervousness Changes in sleep patterns Digestive upset (nausea, vomiting, diarrhea)
These are typically mild and often subside as your body adjusts to the medication. However, persistent or worsening symptoms need medical attention.
Serious Side Effects (Seek immediate medical help):
- Chest pain Shortness of breath Severe allergic reactions (rash, itching, swelling) Seizures
Your doctor will monitor your thyroid hormone levels through blood tests. Regular check-ups are vital to ensure the dosage is correct and to manage any side effects effectively.
Precautions:
Inform your doctor about all medications you take, including over-the-counter drugs and supplements. Some medications can interact with Synthroid. Take Synthroid on an empty stomach, at least 30 minutes before breakfast. Food and some beverages can affect absorption. Avoid high doses of calcium or iron supplements near the time you take Synthroid. These can reduce absorption. Be aware that Synthroid can affect your heart rate and blood pressure. Discuss any concerns with your physician. Changes in dosage should only be made under your doctor’s guidance. If you are pregnant or breastfeeding, consult your doctor before taking Synthroid. Dosage may need adjustment.
Specific Considerations for Older Adults
Older adults may be more sensitive to Synthroid’s effects and may require closer monitoring and a lower starting dose.
