Abstract

ObjectivesTo evaluate efficacy and satisfaction of dextromethorphan as a non-narcotic adjuvant to current analgesic regimens for medication abortion. Study DesignWe conducted a randomized, double-blinded, placebo-controlled trial. We randomized eligible participants (N = 156) 1:1 to adjunctively take dextromethorphan (loading dose 60 mg and two subsequent 30 mg doses at 2 and 5 hours after misoprostol administration) or placebo combined with usual-care nonsteroidal anti-inflammatory medications ± opioids for pain. Participants reported pain scores and satisfaction using a secure texting application at 2, 5, 8, and 24 hours after misoprostol administration. Our primary outcome was worst pain score and total analgesic use. ResultsBaseline demographics of enrolled participants were similar between randomization arms. Worst pain scores for participants receiving dextromethorphan versus placebo (8.0 vs 7.0, p = 0.06) did not differ. Total milligram usage of ibuprofen (800 mg vs 610 mg, p =.62), acetaminophen (1000 mg vs 1300 mg, p = 0.62), and opioids (10 mg vs 15 mg, p = 0.51) did not differ between the randomization groups. Participants randomized to placebo were significantly more likely to be satisfied with their pain control (91% vs 75%, p = 0.02). ConclusionDextromethorphan used adjunctively with standard analgesics did not reduce pain associated with medication abortion. Participants who received dextromethorphan reported decreased satisfaction with their pain control. ImplicationsDextromethorphan used adjunctively with commonly used analgesic regimens did not reduce medication abortion associated pain. Many participants did not use analgesics as counseled, and nearly 25% used no analgesia during medication abortion.

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