Abstract
The effects of the biogenic amine reuptake inhibitors fluoxetine, clomipramine and imipramine on the behaviour of rats after chronic treatment with Δ 9 tetrahydrocannabinol (Δ 9-THC) for 5 and 10 days were examined. Rats with permanently in-dwelling IV cannulae were injected twice daily with doses of Δ 9-THC (2–6 mg/kg). Δ 9-THC treatment reduced the rate of body weight gain and induced the typical biphasic modifications of behaviour. Tolerance developed to both of these effects. On days 6 and 11 of the experiment, rats were injected IP with 15 mg/kg imipramine HCl, clomipramine HCl or fluoxetine HCl, and behaviour, consisting of writhes, backward kicks, jumps and wet shakes, was observed for the next 30 min. Each of the amine reuptake inhibitors induced changes in behaviour, the severity of which appeared to correlate with their ability to inhibit the reuptake of 5-hydroxytryptamine (5-HT). It is suggested that tryptaminergic mechanisms are involved in the production of a withdrawal-like behaviour after chronic Δ 9-THC treatment.
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Verberne, A.J.M., Taylor, D.A. & Fennessy, M.R. Withdrawal-like behaviour induced by inhibitors of biogenic amine reuptake in rats treated chronically with Δ 9-tetrahydrocannabinol. Psychopharmacology 68, 261–267 (1980). https://doi.org/10.1007/BF00428113
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DOI: https://doi.org/10.1007/BF00428113