Abstract |
The possibility that activation of opioid receptors is involved in the analgesic activity of ketorolac was explored. The analgesic effects of ketorolac, of ketocyclazocine, the prototype kappa-agonist, and of morphine, the prototype mu-agonist, were assayed in the pain-induced functional impairment model in the rat. All three drugs induced a significant analgesic effect in this model. Naloxone was able to antagonize the effects of ketocyclazocine and morphine. However, the effect of ketorolac was not blocked by naloxone, although a high dose, 3.2 mg kg-1, capable of blocking kappa-receptors was used. It is concluded that activation of mu- or kappa-opioid receptors, by either a direct or an indirect mechanism, does not play a role in the analgesic activity of ketorolac.
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Authors | V Granados-Soto, F J Flores-Murrieta, G Castañeda-Hernández, E Hong, F J López-Muñoz |
Journal | The Journal of pharmacy and pharmacology
(J Pharm Pharmacol)
Vol. 47
Issue 6
Pg. 514-7
(Jun 1995)
ISSN: 0022-3573 [Print] England |
PMID | 7674136
(Publication Type: Comparative Study, Journal Article)
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Chemical References |
- Analgesics
- Analgesics, Non-Narcotic
- Receptors, Opioid, kappa
- Receptors, Opioid, mu
- Naloxone
- Ethylketocyclazocine
- ketazocine
- Morphine
- Tolmetin
- Ketorolac
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Topics |
- Analgesics
(antagonists & inhibitors, pharmacology)
- Analgesics, Non-Narcotic
(antagonists & inhibitors, pharmacology)
- Animals
- Ethylketocyclazocine
(analogs & derivatives, pharmacology)
- Female
- Ketorolac
- Morphine
(pharmacology)
- Movement Disorders
(drug therapy)
- Naloxone
(pharmacology)
- Pain Measurement
(drug effects)
- Rats
- Rats, Wistar
- Receptors, Opioid, kappa
(drug effects)
- Receptors, Opioid, mu
(drug effects)
- Time Factors
- Tolmetin
(analogs & derivatives, antagonists & inhibitors, pharmacology)
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