Yonsei Med J.  2014 Jul;55(4):1095-1100. 10.3349/ymj.2014.55.4.1095.

Concentration of Non-Steroidal Anti-Inflammatory Drugs in the Pelvic Floor Muscles: An Experimental Comparative Rat Model

Affiliations
  • 1Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei, Taiwan.
  • 2Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital at Keelung, Keelung, Taiwan.
  • 3Department of Research and Development, Standard Chemistry and Pharmaceutical. Co., Ltd, Taipei, Taiwan.
  • 4Department of Bioanalysis, Standard Chemistry and Pharmaceutical. Co., Ltd, Taipei, Taiwan.
  • 5Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital at Linkou and Chang Gung University College of Medicine, Tao-Yuan, Taiwan. wang2260@gmail.com

Abstract

PURPOSE
The aim of this study is to explore non-steroid anti-inflammation drugs (NSAIDs) potency for pelvic floor muscle pain by measuring local concentration in a rat model.
MATERIALS AND METHODS
We used nine NSAIDs, including nabumetone, naproxen, ibuprofen, meloxicam, piroxicam, diclofenac potassium, etodolac, indomethacin, and sulindac, and 9 groups of female Wister rats. Each group of rats was fed with one kind of NSAID (2 mg/mL) for three consecutive days. Thereafter, one mL of blood and one gram of pelvic floor muscle were taken to measure drug pharmacokinetics, including partition coefficient, lipophilicity, elimination of half-life (T1/2) and muscle/plasma converting ratio (Css, muscle/Css, plasma).
RESULTS
Diclofenac potassium had the lowest T1/2 and the highest mean Css, muscle/Css, plasma (1.9 hours and 0.85+/-0.53, respectively). The mean Css, muscle/Css, plasma of sulindac, naproxen and ibuprofen were lower than other experimental NSAIDs.
CONCLUSION
Diclofenac potassium had the highest disposition in pelvic floor muscle in a rat model. The finding implies that diclofenac potassium might be the choice for pain relief in pelvic muscle.

Keyword

Chronic pelvic pain; myofacial pain syndrome; non-steroid anti-inflammation drugs; pelvic floor muscle

MeSH Terms

Animals
Anti-Inflammatory Agents, Non-Steroidal/*therapeutic use
Butanones/therapeutic use
Chronic Pain/*drug therapy
Diclofenac/therapeutic use
Female
Muscles/drug effects
Naproxen/therapeutic use
Pelvic Floor/*pathology
Pelvic Pain/*drug therapy
Piroxicam/therapeutic use
Rats
Rats, Wistar
Thiazines/therapeutic use
Thiazoles/therapeutic use
Anti-Inflammatory Agents, Non-Steroidal
Butanones
Thiazines
Thiazoles
Piroxicam
Diclofenac
Naproxen
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