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| Medication | Trimester to be used | Side effects |
|---|---|---|
| Propylthiouracil (PTU) | 1st trimester | Hepatotoxicity |
| Carbimazole (CBZ) | 2nd and 3rd trimester | Choanal and esophageal atresia, aplasia cutis congenita, minor facial anomalies and psychomotor delay during 1st trimester organogenesis, hepatotoxicity |
