• Non-acute porphyrias include congenital erythropoietic porphyria, erythropoietic protoporphyria and porphyria cutanea tarda.
• If a person has an unequivocal diagnosis of congenital erythropoietic porphyria or erythropoietic protoporphyria, all drugs are considered to be safe.
• If a person has been diagnosed with porphyria cutanea tarda, all drugs are considered to be safe excepting oestrogens and high-dose chloroquine or hydroxychloroquine when the porphyria is active.

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