tramadol opioid agonist or antagonist is benzodiazepine an agonist or antagonist

Tramadol opioid agonist or antagonist, is benzodiazepine an agonist or antagonist

tramadol opioid agonist or antagonist --> tramadol opioid agonist or antagonist
tramadol opioid agonist or antagonist is benzodiazepine an agonist or antagonist tramadol opioid agonist or antagonist
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