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Patterns of total analgesic use and use of specific analgesics before and during pregnancy among women with no migraine history, previous history of migraine, recent history of migraine (within 1 year prior to pregnancy) and migraine in the past month (% users in each group with 95% confidence intervals). Analgesics include paracetamol, NSAIDs, opioids and triptans, used for either migraine or headache
