Propylthiouracil is an antithyroid medicine. It reduces the amount of thyroid hormone the thyroid gland makes.

What Propylthiouracil Is Used For

Overactive thyroid (hyperthyroidism), including Graves' disease
Hyperthyroidism in early pregnancy, when advised
Thyroid storm, in hospital
Preparation for thyroid surgery or radioiodine

Common Side Effects

Skin rash or itching
Nausea
Joint pain
Liver damage (rare but serious)
Low white blood cells (rare)

Precautions

Report sore throat, fever or mouth ulcers straight away, as these may signal low white cells. Seek help for yellow skin, dark urine or tummy pain. Regular blood tests are needed.

This page is general information only. It is not a substitute for advice from your doctor or pharmacist, and it does not include dosage. Always follow the directions given to you and read the leaflet inside the pack.