Antithyroid Drugs for Hyperthyroidism
Medication therapy to control overactive thyroid. Methimazole and PTU reduce thyroid hormone production, helping manage hyperthyroidism and Graves disease.
What are Antithyroid Drugs?
Antithyroid drugs (ATDs) are medications that reduce the production of thyroid hormones. They're the first-line treatment for hyperthyroidism, particularly Graves disease.
These medications don't cure hyperthyroidism but control symptoms by lowering hormone levels. Many patients achieve remission after 12-18 months of treatment.
Common Antithyroid Drugs
- ✓Methimazole (first-line choice)
- ✓Propylthiouracil (PTU) - used in pregnancy
Treatment Process
Initial Phase
Weeks 1-4
Higher starting dose to quickly control symptoms. Usually 10-30mg methimazole daily.
Maintenance Phase
Months 2-12
Dose is gradually reduced based on thyroid function tests. Aiming for lowest effective dose.
Remission Phase
12-18 months
If tests remain normal, medication may be slowly tapered. About 50% achieve remission.
Side Effects to Watch For
Common
- •Skin rash or itching
- •Joint pain
- •Nausea or upset stomach
- •Loss of taste
Rare but Serious
- •Liver problems (yellow skin/eyes)
- •Low white blood cells (fever, sore throat)
- •Severe skin reactions
- •Kidney problems
Frequently Asked Questions
How long do I need to take antithyroid drugs?
Treatment typically lasts 12-18 months. If thyroid function remains normal after tapering, you may achieve remission and stop medication.
Can antithyroid drugs cure hyperthyroidism?
They control symptoms but don't cure the underlying condition. About 50% of patients achieve long-term remission after a course of treatment.
What if I become pregnant while taking these drugs?
Inform your doctor immediately. Methimazole can be used in pregnancy, but PTU is often preferred in the first trimester. Close monitoring is essential.
Do I need regular blood tests?
Yes, regular TSH and thyroid function tests are needed to monitor response and adjust dose. Tests are usually every 4-8 weeks initially.
Can I take antithyroid drugs with other medications?
Inform your doctor about all medications. Some drugs can interact with antithyroid drugs. Always check with your healthcare provider.
Get Expert Hyperthyroidism Care
Expert antithyroid drug treatment in Kathmandu.