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Field Field type Value generic String Tramadol / Acetaminophen brand String Ultracet, Tramacet structure File classes List of String , delimiter: , mechanism String uses String '"`UNIQ--vote-0000152F-QINU`"' starting_dose String 2 tablets (75 mg tramadol / 650 mg acetaminophen) PO every 4-6 hours as needed; maximum 8 tablets/day for ≤5 days preparations String Tramadol/acetaminophen 37.5/325 mg tablets fda_max String 8 tablets/d (300 mg tramadol / 2600 mg acetaminophen); 5-day duration limit per label pill_id Text routes List of String , delimiter: , Oral onset String 30-60 minutes duration String 4-6 hours halflife String Tramadol ~5-7 hours (M1 metabolite ~9 hours); acetaminophen 1-3 hours'"`UNIQ--ref-00001530-QINU`"' bioavailability String Tramadol ~75% (oral); acetaminophen 85-98%'"`UNIQ--ref-00001531-QINU`"' pregnancy String Avoid; neonatal opioid withdrawal documented.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> legal String [[USLegal:Schedule IV|Schedule IV controlled substance]] in US (tramadol was reclassified from non-controlled to Schedule IV in 2014 after recognition of dependence risk)
