Drug-test interaction as a factor in the development of tolerance to the analgesic effect of morphine.
D000698:Analgesia; D000704:Analysis of Variance; D000818:Animals; D004361:Drug Tolerance; D006358:Hot Temperature; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D051381:Rats; D011930:Reaction Time / Q000187:drug effects; D013696:Temperature
D009020:Morphine