Journal of internal medicine
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Randomized Controlled Trial Comparative Study Clinical Trial
A comparison of metoprolol and morphine in the treatment of chest pain in patients with suspected acute myocardial infarction--the MEMO study.
To compare the analgesic effect of metoprolol and morphine in patients with chest pain due to suspected or definite acute myocardial infarction after initial treatment with intravenous metoprolol. ⋯ In suspected acute myocardial infarction, if chest pain persists after intravenous beta-adrenergic blockade treatment, standard doses of an opioid analgesic such as morphine will offer better pain relief than increased dosages of metoprolol.