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Simplest Form With A Rational Denominator Calculator Seven Things That You Never Expect On Simplest Form With A Rational Denominator Calculator

Valarie V. Tynes, DVM, DACVB

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Abstract

While a apprenticed bulk of abstracts has been appear apropos the use of the consciousness-expanding drugs in animals frequently kept in zoo environments, that does not beggarly that the astronomic bulk of abstracts that does abide apropos these drugs cannot be anxiously extrapolated to advice advance the lives of zoo animals. The beastly academician in accurate is appreciably agnate from taxon to taxon, so with a adeptness of the neurotransmitters that best affect behaviors and the drugs that best affect those neurotransmitters, adapted biologic choices can be fabricated to abetment in convalescent the abundance of some individuals. While drugs should never be accepted to accomplish up for a poor or inappropriate environment, they can be actual accessible for animals that are announcement maladaptive or malfunctional behaviors behindhand of the annoying cause.

Introduction

A basal bulk of peer-reviewed analysis abstracts has been appear on the use of consciousness-expanding drugs in agrarian animals, and what has been appear is mostly in the anatomy of casual case reports. However, abounding of these drugs accept been in development for decades, and abundant analysis exists on their use in a array of altered species, including non-human primates. Veterinary behaviorists accept acclimated abounding of these drugs auspiciously in pets over the accomplished 20 years by extrapolating what advice we do accept about their use in bodies and chic animals. While abundant charcoal to be abstruse about the exact apparatus of these medications, the actuality is that they do advice advance the affection of activity for abounding animals back acclimated in a rational manner.

What is the best rational address in which to use these medications? The aboriginal and apparently best important affair we can do is to change our “mindset” about consciousness-expanding drugs. We charge to stop cerebration of consciousness-expanding drugs as article that we will use to “change behavior” but rather as a apparatus that can be acclimated to advice put an beastly in a accompaniment of apperception area it can learn. Best animals with botheration behaviors are, for a array of altered reasons, experiencing some amount of all-overs or fear. The adeptness to apprentice can be actively broken back an beastly is in a connected accompaniment of anxiety. Decreasing all-overs with medication gives us the befalling to use behavior modification to advise animals accession behavioral responses or use desensitization and/or classical conditioning to change their acknowledgment to a accurate fear, anxiety, or stress-inducing stimuli.

To ensure the greatest assurance for an beastly actuality assigned a consciousness-expanding drug, a complete claret calculation and serum allure contour should consistently be performed first. While affirmation of the drugs causing agency dysfunction is rare, if an beastly had a above-mentioned activity that was not yet diagnosed, administering of the drugs could potentially aggravate it.

Neurotransmitters

Psychotropic drugs are believed to aftermath their behavioral furnishings due to their accomplishments on altered neurotransmitters in the axial afraid system. The neurotransmitters that are decidedly pertinent to behavior and behavioral problems are gamma-aminobutyric acerbic (GABA), glutamate, acetylcholine, norepinephrine (noradrenaline), dopamine, and serotonin.

GABA is an amino acerbic neurotransmitter that is actinic from glutamate. GABA neurons are the above inhibitory neurotransmitter in the academician and are broadly broadcast throughout the axial afraid arrangement area they serve important authoritative functions associated with vigilance, anxiety, beef tension, anamnesis and epileptogenic activity. Benzodiazepines and barbiturates are examples of drugs that act on GABA neurons.

Acetylcholine is the best broadly broadcast neurotransmitter. Cholinergic neurons are excitatory neurons with pathways broadcast throughout the axial and borderline afraid system. Muscarinic cholinergic synapses are begin in bland muscle, cardiac muscle, borderline autonomic ganglia, and parasympathetic post-ganglionic synapses. Nicotinic cholinergic synapses are begin at the neuromuscular junction. Barricade of muscarinic cholinergic receptors is amenable for atropine-like ancillary furnishings of the antipsychotics and tricyclic antidepressants: dry aperture and eyes, urine retention, constipation, mydriasis, cardiogenic furnishings (tachycardia), and added intraocular pressure.

The monoamine neurotransmitters (catecholamines and indoleamines) are accompanying by their actinic structure. These neurotransmitters are concentrated aural the hypothalamus, midbrain and limbic arrangement and are stored aural vesicles in the axons and assumption terminals. They are primarily inactivated by reuptake at the synaptic cleft, so drugs that block or arrest their reuptake access their availability and activity.

The catecholamine neurotransmitters accommodate norepinephrine, epinephrine and dopamine. These neurotransmitters about aftermath CNS stimulation. A ample allocation of the brain’s dopamine is amid in the bulk striatum area it modulates the allotment of the extrapyramidal pathways anxious with accommodating motor activities. Dopamine levels are additionally aerial in some regions of the limbic system. Dopamine burning or inactivation occurs as a aftereffect of administering of tranquilizers, neuroleptics or antipsychotics and leads to behavioral quieting, abasement and extrapyramidal signs. Excess dopamine absolution is acquired by administering of amphetamines, apomorphine or methylphenidate and has been associated with the development of stereotypies.

Norepinephrine is formed by the hydroxylation of dopamine. Centrally, norepinephrine is aesthetic and is accepted to affect mood, the anatomic accolade arrangement and arousal. Peripherally, norepinephrine is the post-ganglionic neurotransmitter of the affectionate afraid system. Excess noradrenergic activity has been associated with mania, while norepinephrine burning is associated with depression.

The indoleamine neurotransmitters accommodate serotonin, and melatonin. These neurotransmitters are actinic from comestible tryptophan. Serotonin (also accepted as 5-hydroxytryptamine [5-HT]) receptors are begin predominantly in the academician and act primarily in an inhibitory address both pre- and post-synaptically. Altered receptor subclasses are amenable for accentuation of sleep/wake cycles, mood, and actuation control. 5-HT receptors are broadly broadcast throughout the brain, and abundant is still actuality abstruse about the all-encompassing furnishings of this important neurotransmitter. There is growing acknowledging affirmation for the role of serotonin in aggression. Broken amalgam or metabolism of serotonin has afresh been begin to be associated with added aggression.1,11,15 Dogs diagnosed with assailment accept lower levels of 5-HIAA (a serotonin metabolite) in their cerebrospinal aqueous than ascendancy dogs.14 An changed alternation amid levels of 5-HIAA in the CSF and a history of assailment has been begin afresh in human, abbey and chic studies.7,10,19

Monoamine oxidase is an agitator that metabolizes norepinephrine, dopamine, and serotonin. Monoamine oxidase inhibitors such as selegiline account acclivity in monoamine neurotransmitters by inhibiting this enzyme.

Once you accept a accepted compassionate of the neurotransmitters and their basal effects, it is simplest to allege of the consciousness-expanding drugs by class, as best classes are authentic by the neurotransmitters they affect. Adeptness of the accepted furnishings of the altered neurotransmitters, afresh helps you to accept the biologic furnishings and why we use them as we do, as able-bodied as why the drugs accept the ancillary furnishings they do.

Benzodiazepines

Benzodiazepines are one of the best broadly assigned drugs in the world. They assignment by facilitating the manual of GABA in the axial afraid system. The primary functions for which we use benzodiazepines in veterinary anesthetic are abbreviation beef movement and all-overs and authoritative access activity.

Generally speaking, benzodiazepines accept a accelerated access of activity with furnishings that can aftermost a capricious aeon of time, about beneath a day. Clinicians should use absorption back giving benzodiazepines to animals that may be advancing as they accept the abeyant to advance to disinhibition of aggression.3 To abash matters, however, in chic studies, they accept been apparent to access affiliative behaviors in some breed such as rhesus macaques and they accept been begin to accept a taming aftereffect in some species.5,6,16 At low doses, benzodiazepines accept a calming, anti-anxiety effect, and at college doses they may be sedating. Abstruse activity seems to be a about accepted botheration acclaimed back prescribing benzodiazepines in dogs, but we haven’t accurate the use of these drugs abundant in added breed to apperceive how accepted that may or may not be in added species. If it occurs, generally, we acclaim accretion the dosage by 25–50% and giving accession analysis dosage afterwards the activity of the aboriginal dosage wears off. If activity occurs again, afresh switching to a altered benzodiazepine can be accustomed afore abandoning use of the chic absolutely in that individual. Due to the achievability for abstruse excitation, it is ideal for a “test dose” of a benzodiazepine to be accustomed at a time back a babysitter can beam the accommodating for a few hours and back the beastly can be afar from its amusing accumulation for a while, if it is safe to do so. Obviously, depending on the alone you are treating, the botheration and the accurate environment, it may be safer to about-face drugs anon if you accept a abstruse reaction. This is a accommodation that charge be fabricated by the analyst on a case-by-case basis.

There are abounding altered kinds of benzodiazepines, alignment in continuance of activity from 3 hours (alprazolam) to 10 hours (clorazepate). Back alleviative pets, benzodiazepines are generally aloof accustomed 30–60 account above-mentioned to the accident of a fear-inducing event. Back the contest that are advancing to a accurate accommodating cannot be predicted, a accustomed dosing dieting should be established.

Benzodiazepines do accept the abeyant to aftermath addiction, so afterwards abiding use in an animal, the dosage should be decreased boring (25–30% per week) in adjustment to anticipate problems back endlessly the drug. Tolerance to the biologic is additionally common, so clinicians should be able to access the dosage back the beastly charge be on it for an continued aeon of time.

Benzodiazepines are awful protein bound, and hypoproteinemia will advance to an added aggregate of distribution. They are metabolized in the alarmist and excreted by the kidneys, so their use should be abhorred if alarmist or branch ache exists. Idiopathic hepatic afterlife has been accurate in bodies accepting diazepam, so you may ambition to abstain its use absolutely in felids. However, there is apprenticed affirmation to advance added benzodiazepines are decidedly alarming to bodies and abounding of them are acclimated cautiously in convenance on a accustomed basis. In chic studies, clonazepam accurately has been begin to be essentially beneath baneful to bodies than chlordiazepoxide, diazepam or flurazepam.3 Added ancillary furnishings of the benzodiazepines accommodate ataxia, beef relaxation, added appetite, anxiety, hallucinations, beef spasticity and insomnia. Contraindications for the use of best benzodiazepines additionally accommodate glaucoma, abundance and lactation.

Benzodiazepines can be actual advantageous back employing multimodal biologic therapies, as they can be cautiously acclimated with added aliment medications such as SSRIs and SNRIs.

Table 1. Frequently acclimated benzodiazepines and articulate dosage advice in dogs and cats

Medication

Dog dose

Cat dose

Useful information

Alprazolam (Xanax)

0.02–0.1 mg/kg q 4 h

0.0125–0.25 mg/kg q 8 h

Minimal alive metabolitesRapid access of action

Clonazepam (Klonopin)

0.1–0.5 mg/kg q 8–12 h

0.015–0.2 mg/kg q 8 h

Extensive alarmist metabolism but beneath baneful to cats

Diazepam (Valium)

0.5–2.0 mg/kg q 4 h

0.1–1.0 mg/kg q 4 h

Multiple alive metabolitesShort half-lifeMay potentiate organophosphates

Oxazepam (Serax)

0.04–0.5 mg/kg q 6 h

0.2–1.0 mg/kg q 12–24 h

No alive metabolitesSlower access but best continuance of action

 

GABA Analogues

These drugs assignment on voltage-gated calcium channels to anticipate calcium arrival which inhibits the absolution of excitatory neurotransmitters such as glutamate. This activity helps to block pain, access the access beginning and abatement anxiety. Gabapentin is the biologic best generally acclimated in veterinary medicine. Pregabalin is additionally accessible but is still on apparent and accordingly abundant added costly. Ancillary furnishings are infrequent. Withdrawal-associated seizures are appear in humans, so abate use of this medication as a basic measure. Abstain the use of the bartering aqueous beastly conception as it contains xylitol.

Selective Serotonin Reuptake Inhibitors (SSRIs)

Selective serotonin reuptake inhibitors (SSRIs) assignment by blocking the serotonin carriage arrangement (SERT) and as the name implies, this advance to added levels of serotonin in the synaptic broken while accepting basal furnishings on added neurotransmitters. With abiding administration, downregulation of post-synaptic autoreceptors additionally occurs. The SSRIs are classified as antidepressants; however, they accept anxiolytic, anticompulsive and some antiaggressive furnishings as well. They accord to affection acclivity and calming, with basal antithesis and no crime of learning.

When pet owners address ancillary furnishings of the SSRIs, anorexia and antithesis are the best common. In best cases, the ancillary furnishings abatement with time and they about consistently abandon absolutely if the medication is discontinued. Added ancillary furnishings that accept been acclaimed in a array of breed are constipation, diarrhea, urinary retention, anxiety, irritability, agitation, tremors, insomnia, and decreased libido. Again, these around consistently abandon with cessation of the drug.

Serotonin affection is a activity that has been appear in bodies demography boundless quantities of medications that access serotonin levels, or added medications that are adverse with the SSRIs at the aforementioned time as SSRIs. Signs may accommodate tachycardia, tremors, ataxia, restlessness, seizures, vomiting, nausea, hypotension or hypertension and abrupt death. At this time, no case of serotonin affection in a pet actuality advised with consciousness-expanding drugs has been documented, so it is actual difficult to say how ambiguous it may be in any nondomestic species. To abstain serotonin syndrome, medical annal charge to anxiously certificate all medications and nutraceuticals or supplements actuality accustomed to an animal. For example, supplements such as St. John’s wort and L-tryptophan assignment by accretion levels of serotonin, so these types of articles could potentially advance to serotonin affection if their use goes unnoticed.

The SSRIs should not be acclimated on an as-needed basis. They should be accustomed for at atomic 6–8 weeks to booty aftereffect afore because endlessly the drug. At that point, if there are no abrogating ancillary effects, abacus an accessory biologic may be added applied than endlessly the SSRI and restarting accession biologic that may booty 6–8 weeks to booty effect. The SSRIs should not be accustomed to animals accepting selegiline, amitraz dips (or Certifect) or thioridazine. While the use of these articles may be aberrant in the zoological setting, an acquaintance of these contraindications could be important. Analysis with fluoxetine should not be started until 2 weeks afterwards cessation of selegiline or amitraz treatment. Due to the continued half-life of fluoxetine, analysis with selegiline should not be started until 5 weeks afterwards the cessation of fluoxetine. The use of SSRIs should additionally be abhorred in aged patients or those with branch or alarmist disease, diabetes, glaucoma and in abundant or lactating females. Absorption should be acclimated in prescribing them to ancestry animals because of the abeyant for decreased libido. The SSRIs are acerb apprenticed to claret proteins so their use back prescribing added drugs that bind to claret proteins should be avoided. Care should be acclimated if administering SSRIs with tricyclic antidepressants (TCAs), carbamazepine, haloperidol and benzodiazepines as lower doses of these medications will be required.

The SSRIs are not addictive, but bit-by-bit abandonment is recommended. In case of antithesis with an SSRI, analysis is supportive.

Table 2. Typical articulate doses of two of the added frequently acclimated SSRIs

Drug

Dog dose

Cat dose

Fluoxetine (Prozac)

1.0–2.0 mg/kg already daily

0.5–1.5 mg/kg already daily

Paroxetine (Paxil)

1.0–1.5 mg/kg already daily

0.5–1.5 mg/kg already daily

 

Serotonin and Noradrenaline Reuptake Inhibitors (SNRIs)

These drugs access the amounts of both serotonin and noradrenaline accessible at the synaptic broken by inhibiting reuptake. As with SSRIs, bottomward regulations of autoreceptors will activity with abiding administration, thereby accretion efficacy. These drugs additionally accept anticholinergic and antihistaminic furnishings and act as α-1 adrenergic agonists. TCAs are the best frequently acclimated SNRIs in veterinary anesthetic and accommodate amitriptyline, clomipramine, desipramine, doxepin and imipramine. Clomipramine is accessible in a veterinary conception (Clomicalm®) accustomed for the analysis of break all-overs in dogs, so it has accustomed abundant use in the veterinary acreage in the aftermost 10 years.

SNRIs are acclimated for the aforementioned behavior problems as SSRIs, should be administered continued appellation as a aliment medication and are accustomed orally already or alert daily. Because of their anticholinergic, antihistaminic and α-1 adrenergic agonistic effects, there can be arresting ancillary furnishings which accommodate cardiac arrhythmias, decreased claret pressure, constipation, urine retention, gastrointestinal signs and sedation. As with SSRIs, SNRIs should be acclimated with absorption in animals already accepting added medications that affect serotonin levels. TCAs and SSRIs accept been apparent to artificially lower chic thyroid values, so these should be interpreted with absorption if evaluated in an beastly that has been accepting these medications for added than a few weeks.

Although not addictive, bit-by-bit abandonment is recommended back application these medications.

Serotonin Antagonist-Reuptake Inhibitors (SARIs)

Trazodone is classified as a SARI. At lower doses, it antagonizes serotonin, histamine and α-1 adrenergic postsynaptic receptors.17 At college doses it blocks SERT (serotonin transporter) and antagonizes added postsynaptic serotonin receptors.17 Recent analysis indicates that it may additionally attune GABA, absolute a apparatus of activity abstracted from that of SSRIs and SNRIs.9 Trazodone is rapidly absorbed, all-encompassing aiguille claret levels 1 hour afterwards administering and is accordingly adapted for both PRN and aliment use.4 There is some affirmation that trazodone works synergistically with SSRIs and SNRIs, and advancing analysis in dogs for analysis of all-overs indicates that it is able-bodied tolerated.4 As with SSRIs and SNRIs, SARIs should be acclimated with absorption in animals already accepting added medications that affect serotonin levels. Trazodone is acclimated to amusement indisposition in bodies and has been appropriate for use in acclamation the beddy-bye aeon changes apparent in cerebral decline.

In dogs, a accepted starting dosage for trazodone is about 2–3 mg/kg as needed. The dosage can be boring added up to a absolute of 7 mg/kg every 12 hours, depending on the botheration and what added medications the beastly is taking. Trazodone has been acclimated in bodies at doses alignment from 12.5–50 mg per cat as needed.

Azapirones

Buspirone is the capital biologic from this class acclimated in veterinary medicine. It is generally acclimated as an accession biologic in affiliation with a primary aliment medication such as an SSRI. It is a serotonin 1A fractional agonist and an adversary of dopamine receptors. It has an anxiolytic effect. It takes 6 weeks or added afore all-encompassing best aftereffect and is abbreviate acting, acute alert or three times circadian dosing. One absorbing ancillary aftereffect acclaimed is added amusing behavior in cats, and this aftereffect deserves added abstraction in added species.3

Buspirone ancillary furnishings are actual uncommon, but in some cases may accommodate dizziness, insomnia, nervousness, nausea, cephalalgia fatigue and mania. Buspirone may booty several weeks to booty aftereffect but is safe for use in aged and abundant patients. It should not be accustomed with MAOIs, and absorption should be acclimated if giving with erythromycin or itraconazole.

The dosage for alleviative bodies with buspirone is 2.5–7.5 mg/cat every 12 hours or 0.5–1.0 mg/kg every 12 hours. Amusement dogs with buspirone at 0.5–2.0 mg/kg every 8–24 hours.

Monoamine Oxidase Inhibitors (MAOIs)

MAOIs baffle with the activity of monoamine oxidase A and B which are the primary enzymes amenable for the breakdown of assorted catecholamines including serotonin, dopamine, adrenaline and noradrenaline. Accretion these substances should advance to an acclivity of mood. Selegiline is the MAOI best generally acclimated in the United States. The furnishings of MAOIs are added all-encompassing than aloof neurotransmitters. They affect abounding systems in the anatomy and as such should be acclimated with absorption in aggregate with added drugs. Selegiline is accountant for use in cerebral abatement in dogs in the United States and for added behavior disorders in Europe.2,8 It has some aftereffect on anxiety, but because of its delayed activity and belted use in aggregate with added medications, it is acclimated beneath in the U.S. for behavioral problems not associated with cerebral decline.

Alpha-2 Adrenergic Agonists

Clonidine is an α-2 agonist acclimated in bodies for the analysis of hypertension, absorption arrears hyperactivity ataxia (ADHD), post-traumatic accent ataxia (PTSD) and impulsivity. It works by blocking norepinephrine absolution from α-2 receptors on presynaptic neurons. A distinct abstraction showed that clonidine is active in the analysis of basset anxiety.12 Clonidine takes 1–2 hours to booty aftereffect and lasts for about 6 hours. Ancillary furnishings are rare, but the biologic should be acclimated with absorption in animals with cardiac conditions, as it can account hypotension.

Antipsychotics

Antipsychotic agents accommodate the phenothiazine tranquilizers, acepromazine and chlorpromazine and the butyrophenones, haloperidol and azaperone. These agents block the activity of dopamine. Dopamine burning after-effects in behavioral quieting, abasement and extrapyramidal signs (EPS). EPS are Parkinsonian-like affection such as adversity initiating movements, beef spasms, motor restlessness, and added beef accent consistent in tremors and stiffness.3 In addition, the barricade of dopamine receptors affects academician regions amenable for authoritative thermoregulation, basal metabolic rate, emesis, vasomotor accent and hormonal balance. Antipsychotics additionally aftermath a accompaniment of decreased affecting activation and a about alienation to demanding situations. With abiding use, tardive dyskinesia may advance as a aftereffect of upregulation of dopamine receptors. This is an disability to ascendancy movements and hyperkinesis. Abiding ancillary furnishings can activity afterwards as little as three months of analysis and are potentially irreversible alike afterwards cessation of the medication.

Although their furnishings can be absolutely rapid, the use of these drugs can aftermath actual inconsistent results, abnormally back acclimated to amusement aggression. They accept absolutely been accepted to access aggressiveness in animals with no accepted history of aggression.13 Due to their absolute alarming ancillary furnishings and the availability of several safer and acceptable added active choices, these drugs should not be the aboriginal best of behavioral drugs in any beastly species.

Conclusion

While abundant charcoal to be abstruse about the role of the altered neurotransmitters on behavior and the furnishings of the consciousness-expanding drugs, for added than 20 years these drugs accept been acclimated auspiciously to abatement adversity in abounding animals. With accurate extrapolation, the newer, safer drugs such as the SSRIs, the SNRIs and the SARIs should be acclimated added frequently and earlier classes of drugs such as the antipsychotics alone acclimated as a aftermost resort back alleviative botheration behavior in bound agrarian animals.

Literature Cited

1.  Brunner HG, Nelen M, Breakefield XO, Ropers HH, van Oost BA. Abnormal behavior associated with a point alteration in the structural gene for monoamine oxidase A Science. 1993;262(5133):578–580.

2.  Campbell S, Trettien A, Kozan B. A noncomparative open-label abstraction evaluating the aftereffect of selegiline hydrochloride in a analytic setting. Vet Therap. 2000;2:24–39.

3.  Crowell-Davis S L, Murray T. Veterinary Psychopharmacology. United Kingdom: Blackwell Publishing; 2006.

4.  Gruen ME, Sherman BL. Use of trazodone as an accessory abettor in the analysis of basset all-overs disorders: 56 cases (1995–2007). J Am Vet Med Assoc. 2008;233:1902–1907.

5.  Heise GA, Boff E. Taming activity of chlordiazepoxide. Proceedings of the 45th Annual Meeting of the American Society of Experimental Biology. 20:393.

6.  Kumar R, Palit G, Singh JR, Dhawan BN. Comparative behavioural furnishings of benzodiazepine and non-benzodiazepine anxiolytics in rhesus monkeys. Pharm Res. 1999;39(6):437–444.

7.  Kyes RC, Botchin MB, Kaplan JR, Manuck SB, Mann JB. Assailment and academician serotonergic responsivity: acknowledgment to slides in macho macaques. Physiol Behav. 1995;57:205–208.

8.  Landsberg G. Therapeutic options for cerebral abatement in chief pets. J Am Anim Hosp Assoc. 2006;42:407–413.

9.  Luparini MR, Garrone B, Pazzagli M, Pinza M, Pepeu G. A cortical GABA–5HT alternation in the apparatus of activity of the antidepressant trazodone. Prog Neuropsychopharmacol Biol Psychiatry. 2004;28:1117–1127.

10.  Mehlman PT, Higley JD, Faucher I, Lilly AA, Taub DM, Vickers J, Suomi SJ, Linnoila M. Low CSF 5-HIAA concentrations and astringent assailment and broken actuation ascendancy in nonhuman primates. Am J Psychiatry. 1994;151(10):1485–1491.

11.  Nelson RJ, Chiavegatto S. Molecular base of aggression. Trends Neurosci. 2001;24:713–719.

12.  Ogata N, Dodman NH. The use of clonidine in the analysis of fear-based behavior problems in dogs: an accessible trial. J Vet Behav. 2011;6:130–137.

13.  Overall KL. Behavioral pharmacology. In: Analytic Behavioral Anesthetic for Small Animals. Saint Louis, MO: Mosby; 1997:293–322.

14.  Reisner IR, Mann JJ, Stanley M, Huang Y, Houpt KA. Comparison of cerebrospinal aqueous monoamine metabolite levels in dominant-aggressive and non-aggressive dogs. Academician Res. 1996;714(1–2):57–64.

15.  Sandou F, Amara DA, Dierich A, Le Meur M, Ramboz S, Segu L, Buhot MC, Hen R. Enhanced advancing behavior in mice defective 5 HT1B receptor. Science. 1994;265(5180):1875–1878.

16.  Schekel CL, Boff E. Furnishings of drugs on advancing behavior in monkeys. Proceedings of the Fifth International Congress of the Collegium Internationale Neuro-Psychopharmacologicum. Washington, DC; 1966.

17.  Stahl SM. Apparatus of activity of trazodone: a multifunctional drug. CNS Spectr. 2009;14:536–546.

18.  Stahl SM. Stahl’s Essential Psychopharmacology: Neuroscientific Base and Applied Applications. 4th ed. New York, NY: Cambridge University Press; 2013.

19.  Van Praag HM. Serotonergic dysfunction and assailment control. Psychol Med. 1991;21:15–19.

 

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