Acute intermittent porphyria
Living with
How long do acute intermittent porphyria attacks last?
Acute intermittent porphyria attacks can last several days to weeks. Most acute intermittent porphyria attacks last less than 2 weeks.
Acute Intermittent Porphyria. Gene Reviews. (http://www.ncbi.nlm.nih.gov/books/NBK1193)