Riferimento farmaci
Propylthiouracil
Propylthiouracil is a medicine in the class endocrine. It is used for graves disease.
- Classe del farmaco: Endocrine
- Indicato per: graves disease
Ultimo aggiornamento
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In breve
- Classe del farmaco
- Endocrine
- Forme farmaceutiche comuni
- compressa
- Dosaggi comuni
- 50 mg
- Interazioni note
- 16 (Maggiore: 7 · Moderata: 8 · Minore: 1)
- Nomi commerciali
- 3
- Paesi e mercati
- 2
Per cosa si usa
Come agisce
Inhibits synthesis of thyroid hormone by blocking oxidation of iodine in thyroid gland; blocks synthesis of T4 and T3
Dose abituale nell'adulto (sintesi del foglio illustrativo)
Hyperthyroidism: 300-450 mg/day PO divided q8hr initially (may require up to 600-900 mg/day), Maintenance: 100-150 mg/day divided q8hr
Gravidanza e allattamento
- Gravidanza
- Safe Crosses the placenta; excess dose can cause fetal goitre and hypothyroidism. US label: may be preferred in the 1st trimester (methimazole is linked to rare birth defects), then switch to methimazole because of maternal liver toxicity. Use the lowest effective dose; monitor mother and fetus.
- Allattamento
- Safe Small amounts pass into milk (about 0.025% of a 400 mg dose in 4 hours); clinically insignificant (US label). LactMed: methimazole is now preferred because of PTU liver injury, but no infant liver damage has been reported; limit to 450 mg daily if possible.
Effetti indesiderati segnalati
- Drowsiness
- Fever
- Agranulocytosis
- Dermatologic reactions
- Hepatitis
- Aplastic anemia
Chi deve prestare attenzione
- Agranulocytosis within first 3 months of therapy reported; instruct patients to immediately report any symptoms suggestive of agranulocytoses, as fever or sore throat
- Risk of severe rare immunoallergenic hepatitis, High relapse rate (more likely in smokers)
- Discontinue in presence of unexplained fever, Interstitial pneumonitis may occur
Informare il farmacista o il medico di gravidanza o allattamento, malattie renali o epatiche, allergie e di ogni altro farmaco o integratore assunto.
Interazioni principali (16)
- Carbamazepine + Propylthiouracil Major
- Clozapine + Propylthiouracil Major
- Methimazole + Propylthiouracil Major
- Pexidartinib + Propylthiouracil Major
- Pretomanid + Propylthiouracil Major
- Propylthiouracil + Sodium iodide i-131 Major
- Propylthiouracil + Valoctocogene roxaparvovec Major
- Iodinated glycerol + Propylthiouracil Moderate
- Iodine + Propylthiouracil Moderate
- Lycopus + Propylthiouracil Moderate
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- Dosing by age, kidney and liver function, and further dose lines
- Paediatric dosing
- Patient counselling points
- Food interactions
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Altri farmaci della stessa classe
Domande frequenti
What is Propylthiouracil used for?
Propylthiouracil is a medicine in the class endocrine. It is used for Graves disease, Hyperthyroidism.
What side effects have been reported with Propylthiouracil?
Drowsiness, Fever, Agranulocytosis, Dermatologic reactions, Hepatitis, Aplastic anemia.
Can Propylthiouracil be taken in pregnancy or while breastfeeding?
Pregnancy: Safe. Crosses the placenta; excess dose can cause fetal goitre and hypothyroidism. US label: may be preferred in the 1st trimester (methimazole is linked to rare birth defects), then switch to methimazole because of maternal liver toxicity. Use the lowest effective dose; monitor mother and fetus. Breastfeeding: Safe. Small amounts pass into milk (about 0.025% of a 400 mg dose in 4 hours); clinically insignificant (US label). LactMed: methimazole is now preferred because of PTU liver injury, but no infant liver damage has been reported; limit to 450 mg daily if possible.
What does Propylthiouracil interact with?
MediHelp lists 16 known interactions for Propylthiouracil. Major: 7 · Moderate: 8 · Minor: 1. The most serious include Carbamazepine, Clozapine, Methimazole.
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