"an oral antagonist against the action of opiates"@en-us . "naltrexone"@en-us . "103806547"^^ . . . "103663582"@en-us . "0"^^ . . . . "naltrexone"^^ . . . . "an oral antagonist against the action of opiates"@en-us . "0"^^ . . "03806547-n"^^ . .