Take Propylthiouracil tablets by mouth as directed by your doctor. Usually, it is taken three times a day, every eight hours. Carefully follow the directions on your prescription label and ask your doctor or pharmacist to explain any part that you do not understand. Take Propylthiouracil exactly as directed, without taking more or less of it or taking it more often than prescribed by your doctor. Once your condition is under control, your doctor may decrease your dose of Propylthiouracil. Even if you feel well, continue to take the medication, and do not stop taking it without talking to your doctor.
The usual adult starting dose of propylthiouracil is 50Â mg to 100Â mg every 8 hours, with increases as necessary up to a maximum of 500Â mg daily or as directed by your doctor. When doses larger than 300Â mg per day are needed, the medication should be taken every 4 to 6 hours. Children’s doses are based on their body weight.
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