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Selective Serotonin Reuptake Inhibitors (Clomipramine, Fluoxetine) (view source)

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:*Feline Urine Marking

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As with other drugs used to treat behavioural problems it is recommended that fluoxetine be used in conjunction with behavioural modification techniques <ref name="Simpson" /><ref>Petit, S., Pageat, P., Chaurand, J.P., Heude, B., Beata, C., 1999. Efficacy of clomipramine in the treatment of separation anxiety in dogs: clinical trial. Rev. Med. Vet. 2, 133-140.</ref><ref>King, J.N., Simpson, B.S., Overall, K.L., Appleby, D., Pageat, P., Ross, C., Chaurand, J.P., Heath, S., Beata, C., Weiss, A.B., Muller, G., Paris, T., Bataille, B.G., Parker, J., Petit, S., Wren, J., 2000. Treatment of separation anxiety in dogs with clomipramine: results from a prospective, randomized, double-blind, placebo controlled, parallel-group, multicenter clinical trial. Appl. Anim. Behav. Sci. 67, 255-275.</ref><ref>Seksel, K., Lindeman, M.J., 2001. Use of clomipramine in treatment of obsessive-compulsive disorder, separation anxiety and noise phobia in dogs: a preliminary, clinical study. Aust. Vet. J. 79, 252-256.</ref><ref>Horwitz, D., 2000. Diagnosis and treatment of canine separation anxiety and the use of clomipramine hydrochloride. J. Am. Anim. Hosp. Assoc. 36, 107-109.</ref><ref>Takeuchi, Y., Houpt, K.A., Scarlett, J.N., 2000. Evaluation of treatments for separation anxiety in dogs. J. Am. Vet. Med. Assoc. 217, 342-345.</ref><ref>Landsberg, G., Hunthausen, W., Ackerman, L., 2003. In: Handbook of Behavior Problems of the Dog and Cat, 2nd ed. Elsevier Saunders, Philadelphia, pp. 258-267.</ref>. ~~Fluoxetine has a long half~~-~~life and therefore a minimum of~~ 6-8 weeks should be allowed before making an assessment of efficaciousness.

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As with other drugs used to treat behavioural problems it is recommended that fluoxetine be used in conjunction with behavioural modification techniques <ref name="Simpson" /><ref>Petit, S., Pageat, P., Chaurand, J.P., Heude, B., Beata, C., 1999. Efficacy of clomipramine in the treatment of separation anxiety in dogs: clinical trial. Rev. Med. Vet. 2, 133-140.</ref><ref>King, J.N., Simpson, B.S., Overall, K.L., Appleby, D., Pageat, P., Ross, C., Chaurand, J.P., Heath, S., Beata, C., Weiss, A.B., Muller, G., Paris, T., Bataille, B.G., Parker, J., Petit, S., Wren, J., 2000. Treatment of separation anxiety in dogs with clomipramine: results from a prospective, randomized, double-blind, placebo controlled, parallel-group, multicenter clinical trial. Appl. Anim. Behav. Sci. 67, 255-275.</ref><ref>Seksel, K., Lindeman, M.J., 2001. Use of clomipramine in treatment of obsessive-compulsive disorder, separation anxiety and noise phobia in dogs: a preliminary, clinical study. Aust. Vet. J. 79, 252-256.</ref><ref>Horwitz, D., 2000. Diagnosis and treatment of canine separation anxiety and the use of clomipramine hydrochloride. J. Am. Anim. Hosp. Assoc. 36, 107-109.</ref><ref>Takeuchi, Y., Houpt, K.A., Scarlett, J.N., 2000. Evaluation of treatments for separation anxiety in dogs. J. Am. Vet. Med. Assoc. 217, 342-345.</ref><ref>Landsberg, G., Hunthausen, W., Ackerman, L., 2003. In: Handbook of Behavior Problems of the Dog and Cat, 2nd ed. Elsevier Saunders, Philadelphia, pp. 258-267.</ref>. Although effects are allay seen within 4-6 weeks, 6-8 weeks should be allowed before making an assessment of efficaciousness. The long half-life of fluoxetine and its metabolites also mean that a period of at least 6 weeks should be allowed to pass before administration of any drugs which may interact adversely.

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Due to the long half-life of fluoxetine it is not necessary to gradually reduce or taper the dose. Once treatment with fluoxetine has ceased continued behavioural modification is advisable to avoid the reappearance of clinical signs. The long half-life of fluoxetine and its metabolites also mean that a period of at least 6 weeks should be allowed to pass before administration of any drugs which may interact adversely.

===Adverse Effects<ref>Fluoxetine hydrochloride [https://www.elancocentral.com/Reconcile_Vet_label.pdf data sheet]</ref>===

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*Incoordination

*Hypersalivation

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~~'''Caution should be taken in if the animal suffers from any of the following pre-existing medical conditions:'''~~

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*Contraindicated for animals with a history of epilepsy or seizures

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~~'''Care should be taken if used in conjunction with any of the following drugs, which may interact and cause adverse effects:'''~~

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*Fluoxetine should not be given at the same time as drugs which lower seizure threshold eg. phenothiazines such as acepromazine or chlorpromazine.

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*Monoamine oxidase inhibitors (MAOI), or within a period of 2 weeks after discontinuation of treatment with a MAOI due to the risk of serotonin syndrome<ref>Brown, T.M., Skop, B.P., Mareth, T.R., 1996. Pathophysiology and management of the serotonin syndrome. The Annals of Pharmacotherapy 30, 527–533.</ref>

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*Fluoxetine has not been evaluated with drugs that affect the cytochrome P450 enzyme, care should therefore be taken with any drug that affects the enzyme system eg. ketoconazole.

==References==

Jon Bowen

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