Unit 2- Behavior Modifiers Flashcards
FDA Approved drugs in dogs
reconcile and clomicalm for separation anxiety, anipryl for canine cognitive dysfunction, sileo for noise aversion
Use of Psychotropics
Reduce underlying emotional arousal, adjunct to behavior modification, lead to better learning
Serotonin
5-HT, regulates mood, appetite, sleep, and cognitive function, action ends due to reuptake into presynaptic terminal by serotonin transporter proteins
Indications for long term meds
Generalized anxiety, fear aggression, inter-pet conflict, separation anxiety, cognitive dysfunction syndrome, urine marking, compulsions
Selective Serotonin Reuptake Inhibitors
Fluoxetine (reconcile), paroxetine, sertraline
Tricyclic Antidepressants
Clomipramine (clomicalm), amitryptiline
Azapirones
Seritonergic; buspirone
Monoamine Oxidase Inhibitors
Selegiline (anipryl)
SSRI MOA
Blocks serotonin reuptake transporter, increasing seritonergic neurotransmission
SSRI Initial Actions
Serotonin floods all receptors, different subtype receptors are saturated leading to side effects
SSRI Long Term Action
Receptors downregulate, post synaptic autoreceptor becomes more active leading to therapeutic effect, takes weeks for presynaptic autoreceptor to desensitize
SSRI Indications
Generalized anxiety, OCD, urine marking, aggression, in conjunction with behavioral modification and acute drugs
SSRI Metabolism
Metabolized in liver, plasma levels not related to response level
SSRI Contraindications
Meds using cytochrome P450 enzyme, diabetes, epilepsy, hepatic impairment
SSRI Adverse Effects
Transient GI upset, sedation and lethargy, anxiety, decreased sexual motivation, rare urine retention, seizures, and aggression
Serotonin Syndrome
Excessive seritonergic drugs, tachycardia, muscle tremor, restlessness, agitation, disoreintation, seizures, death
Meds not to combine
SSRIs with TCA, MAOIs, tryptophan, or St. John’s Wort
Fluoxetine Use
Canine separation anxiety FDA approved, compulsions, generalized anxiety, urine marking
Fluoxetine Pharmacology
Highly selective serotonin reuptake inhibitor, not for transdermal use
Paroxetine
Appetite enhancing, anticholinergic effects lead to constipation, shorter half life
Sertraline
Fecal excretion, safer for CKD and hepatic disease, safer for epilepsy
Tricyclic Antidepressants
Inhibits serotonin and norepinephrine reuptake, generalized antihistaminic and anticholinergi
TCA Chronic Use
Significant behavior changes due to decreased number and altered function of serotonin receptors in forebrain
TCA Uses
Generalized anxiety, urine marking, aggression, higher side effects due to less selectivity
Clomipramine
FDA approved, most serotonin specific
Clomipramine Side Effects
Sedation, anticholinergic, arrhythmia, lower seizure threshold, urine retention, testicular hypoplasia
Clompramine Contraindications
Constipation, dry eye, glaucoma, cardiovascular compromise, seizures, breeding males, taper to stop
Amitryptiline
May cause neuropathic pain and acral lick in dogs, can be used in cats with interstitial cystitis and house soiling