, Volume 38, Issue 8, pp 951–953 | Cite as

Reinforcement with naloxone of N-n-propylnorapomorphine (NPA) capability for stimulating male rat copulatory behavior

  • Francesca Ferrari
  • G. Baggio
Specialia Pharmacologica


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).


Naloxone Copulatory Behavior Copulatory Pattern Intromission Frequency Inactive Dose 
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Copyright information

© Birkhäuser Verlag 1982

Authors and Affiliations

  • Francesca Ferrari
    • 1
  • G. Baggio
    • 1
  1. 1.Institute of Pharmacology, Chair of Pharmacology and PharmacognosyUniversity of ModenaModenaItaly

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