Do sex differences exist in opioid analgesia? A systematic review and meta-analysis of human experimental and clinical studies

Sex-Specific Responses to Opiates: Animal and Human Studies

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Response to Morphine in Male and Female Patients: Analgesia and Adverse Events

(2009) Polly E. Bijur et al.   CLINICAL JOURNAL OF PAIN

Association between OPRM1 gene polymorphisms and fentanyl sensitivity in patients undergoing painful cosmetic surgery

(2009) Kenichi Fukuda et al.   PAIN

Evaluation of potential sex differences in the subjective and analgesic effects of morphine in normal, healthy volunteers

(2009) Sandra D. Comer et al.   PSYCHOPHARMACOLOGY

Gender Differences in Analgesia for Endodontic Pain

(2008) Jeffrey L. Ryan et al.   JOURNAL OF ENDODONTICS

A Subanalgesic Dose of Morphine Eliminates Nalbuphine Anti-Analgesia in Postoperative Pain

(2008) Robert W. Gear et al.   JOURNAL OF PAIN

Correlates of Postoperative Pain and Intravenous Patient-Controlled Analgesia Use in Younger and Older Surgical Patients

(2008) Lucia Gagliese et al.   PAIN MEDICINE