Summary
Naloxone at a dose of 2 mg·kg−1, which per se did not significantly alter the copulatory pattern of sexually active adult male rats, did significantly reduce the intromission frequency as well as latency to ejaculation when administered before a low and inactive dose of N-n-propylnorapomorphine (0.5 μg·kg−1).
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Ferrari, F., Baggio, G. Reinforcement with naloxone of N-n-propylnorapomorphine (NPA) capability for stimulating male rat copulatory behavior. Experientia 38, 951–953 (1982). https://doi.org/10.1007/BF01953672
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DOI: https://doi.org/10.1007/BF01953672