Shared Flashcard Set

Details

Antipsychotics/Antidepressants/Anxiolytics/Sedatives
IUSM
38
Pharmacology
Professional
10/06/2014

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Cards

Term
suramin
Definition
Class: anti-parasitic, kinetoplastid drug

Mechanism: unknown

Clinical use: African "sleeping sickness" (T. BRUCEI) @ HEMOLYTIC STAGE

Adverse effects: malaise, nausea, fatigue, headache

Administration: slow IV infusion
Distribution: binds to plasma proteins tightly
Excretion: renal, caution in impaired
Term
pentamidine
Definition
Class: anti-parasitic, kinetoplastid drug

Mechanism: unknown

Clinical use: Africant sleeping sickness (T. Brucei) @ hemolytic stage
Term
phenobarbital
Definition
Class: anxiolytics, barbiturate

Mechanism: allosteric agonist at GABA(A) receptors, enhance duration of transmission; inhibit glutamate receptors

Clinical use: induction of anesthesia; SEIZURES

Adverse effects: impaired cognitive and motor function, small therapeutic index, overdose risk w/ other depressants, tolerance, abuse

Distribution: rapid CNS conc. induces anesthesia, short duration before redistrtibute
Term
pentobarbital
Definition
Class: anxiolytics, barbiturate

Mechanism: allosteric agonist at GABA(A) receptors, enhance duration of transmission, inhibit glutamate receptors

Clinical use: induction of anesthesia

Adverse effects: impaired cognitive and motor function, small therapeutic index, risk of overdose, tolerance, abuse

Distribution: rapid rise in CNS induces anesthesia, short duration before redistribution
Term
thiopental
Definition
Class: anxiolytics, barbiturate

Mechanism: allosteric agonist at GABA(A) receptors, enhance duration of transmission, inhibit glutamate receptors

Clinical use: induction of anesthesia

Adverse effects: impaired cognitive and motor fx, small therapeutic index, overdose risk, tolerance, abuse

Distribution: rapid rise in CNS induces anesthesia, short duration before redistribution
Term
midazolam
Definition
Class: anxiolytics, benzodiazepines

Mechanism: positive allosteric modulator at GABA(A) receptors, enhance transmission and hyperpolarization

Clinical use: ANESTHESIA

Contraindications: sleep apnea

Advantages: rapid onset, relatively high therapeutic index, low risk of drug interactions, minimal CNS or ANS effects

Adverse effects: PSYCHOMOTOR DEPRESSION, residual daytime sedation, tolerance to hypnotic effect, risk of dependence, depression of CNS w/ other depressants, amnestic effects, abuse

Elimination: <6hr
Term
lorazepam
Definition
Class: anxiolytics, benzodiazepines

Mechanism: positive allosteric modulator at GABA(A) receptors, enhance transmission and hyperpolarization

Clinical use: epilepsy, anxiety

Contraindication: sleep apnea

Advantages: rapid onset, high TI, low risk drug intrxns, minimal CNS and ANS effects

Adverse effects: PSYCHOMOTOR DEPRESSION, residual daytime sedation, tolerance to hypnotic effect, risk of dependence, depression of CNS w/ other depressants, amnestic effects, abuse

Elimination: 6-12hr
Term
alprazolam
Definition
Class: anxiolytics, benzodiazepines

Mechanism: positive allosteric modulator at GABA(A) receptors, enhance transmission and hyperpolarization

Clinical use: anxiety

Contraindication: sleep apnea

Advantages: rapid onset, high TI, low risk of drug interxn, minimal effects on CNS and ANS

Adverse effects: PSYCHOMOTOR DEPRESSION, residual daytime sedation, tolerance to hypnotic effect, dependence risk, CNS depression w/ other depressants, amnestic effect, abuse

Elimination: 6-20hr
Term
triazolam
Definition
Class: anxiolytics, benzodiazepines

Mechanism: positive allosteric modulator of GABA(A) receptors, enhance transmission and hyperpolarization

Clinical use: insomnia

Contraindications: sleep apnea

Advantages: rapid onset, high TI, low risk drug interxn, minimal effects on CNS and ANS

Adverse effects: PSYCHOMOTOR DEPRESSION, residual daytime sedation, tolerance to hypnotic effect, dependence risk, CNS depression w/ other depressants, amnestic effect, abuse

Elimination: <6hr
Term
diazepam
Definition
Class: anxiolytics, benzodiazepines

Mechanism: positive allosteric modulator at GABA(A) receptors, enhance transmission and hyperpolarization

Clinical use: anxiety

Contraindications: sleep apnea

Advantages: rapid onset, high TI, low drug interxn, minimal effects of CNS and ANS

Adverse effects: PSYCHOMOTOR DEPRESSION, residual daytime sedation, tolerance to hypnotic effects, dependence risk, depression of CNS w/ other depressants, amnestic effect, abuse

Elimination: >20hr
Term
eszopiclone
Definition
Class: anxiolytics, Z drugs

Mechanism: allosteric agonist at GABA(A) receptor, enhance transmission

Clinical use: insomnia, anxiety

Advantages: rapid onset, modest-day after psychomotor depression, some amnestic effects, low risk of tolerance

Adverse effects: depression of CNS on own and worse w/ other depressants; COMPLEX SLEEPING BEHAVIORS
Term
zaleplon
Definition
Class: anxiolytics, Z drugs

Mechanism: allosteric agonist at GABA(A) receptors, enhance transmission

Clinical use: insomnia, anxiety

Advantages: rapid onset, modest day-after psychomotor depression, amnestic effects, low risk of tolerance

Adverse effects: depression of CNS by self or with other depressants; COMPLEX SLEEPING BEHAVIORS
Term
zolpidem
Definition
Class: anxiolytics, Z drugs

Mechanism: allosteric agonist at GABA(A) receptors, enhances transmission

Clinical use: insomnia, anxiety

Advantages: rapid onset, modest day-after effects, amnestic effects, low tolerance risk

Adverse effects: depression of CNS by self or with other depressants; COMPLEXT SLEEPING BEHAVIORS
Term
flumazenil
Definition
Class: ~anxiolytics, benzodiazepine antagonist

Mechanism: antagonist at benzodiazepine site of GABA(A) receptor

Clinical use: benzodiazepine overdose, shorten recovery following anesthesia with benzodiazepines; NOT COMMON DUE TO ADVERSE EFFECTS

Adverse effects: seizures, agitation, confusion, dizziness, nuause; CAN PRECIPITATE BENZO WITHDRAWAL SYMPTOMS
Term
buspirone
Definition
Class: anxiolytics,

Mehcanism: partial agonist at 5-HT1A receptor, also D2, does not bind GABA receptors

Clinical use: generalized anxiety disorder

Advantage: lack of sedative/hypnotic/euphoric effects, lacks anticonvulsants and muscle relaxing effects; does not impair psychomotor performance; minimal abuse liability

Adverse effects: delayed action
Term
ramelteon
Definition
Class: anxiolytics

Mechanism: agonist at melatonin recpetors, modulate circadian rhythms

Clinical use: insomnia characterized by difficult w/ sleep onset; only sedative-hypnotic not a schedule drug

Advantages: minimal potential for abuse, no rebound insomnia, no withdrawal

Adverse effects: minor

LOW EFFICACY
Term
diphenhydramine
Definition
Class: anxiolytics

Mechanism: antihistamine with some anticholinergic effects

Clinical use: allergies, night-time sleep aid

Adverse effects: long half-life, sedation next day, anticholinergic adverse effects

ROUTINE USE FOR INSOMNIA NOT RECOMMENDED
Term
trazodone
Definition
Class: anxiolytics, antidepressant

Mechanism: serotonin reuptake inhibitor, serotonin receptor antagonist, alpha receptor antagonist, histamine receptor antagonist

Clinical use: depression, off-label-insomnia

Advantage: lack of abuse potential, shorter half-life than TCA (less daytime sedation), less antimuscarinic activity than TCAs

Adverse effects: tolerance to sedating effect, daytime drowsiness, discontinuation syndrome
Term
amitriptyline
Definition
Class: antidepressant, tricyclic

Mechanism: increase levels of NE and 5HT in synaptic cleft by blocking reuptake

Clinical use: mood disorders, panic disorders, GAD, PTSD, OCD, pain disorders

Contraindication: MAO-I coadministration

Adverse effects: anticholinergic effect, antiadrenergic effects, influence Na+ channels (CARDIAC ARRHYTHMIAS), HISTAMINE BLOCKADE, MAY PRECIPITATE MANIA IN BIPOLAR

Absorption: oral
Distribution: easy CNS, bound to plasma proteins
Metabolism: signif. first pass, NORTTRIPTYLINE as metabolite active anti-depress
Elimination: conjugate and renal
Term
imipramine
Definition
Class: antidepressant, tricyclic

Mechanism: increase NE and 5HT in synaptic cleft by inhibiting reuptake

Clinical use: mood disorders, panic disorders, GAD, PTSD, OCD, pain disorders, ENURESIS IN KIDS

Contraindication: MAO-I

Adverse effects: wide effects (histamine, cholinergic and alpha receptor actions), down regulate monoamine receptors, interact w/ Na+ channel (CARDIAC ARRHYTHMIAS), HISTAMINE BLOCAKE, MAY PRECIPITATE MANIA IN BIPOLAR

Absorption: oral
Distribution: easy CNS, plasma protein bound
Metabolism: signif. first pass to active metabolite DESIPRAMINE as antidpress
Elimination: conjugate and renal
Term
fluoxetine
Definition
Class: antidepressant, SSRI

Mechanism: inhibit 5HT reuptake w/o significant effect on NE and DA re-uptake

Clinical use: depression, OCD

Contraindications: MAO-I coadministration

Adverse effects: few than other classes

Absorption: oral
Metabolism: P450 system, inhibit P450s
T1/2: 24hrs
Term
venlafaxine
Definition
Class: antidepressant, SNRI

Mechanism: inhibition of 5Ht and NE reuptake

Clinical use: depression

Advantage: minimal inhibitory action at P450 enzymes

Adverse effects: nausea, dizziness, insomnia, sedation, SEXUAL DYSFUNCTION, constipation; high dose increase BP
Term
duloxetine
Definition
Class: antidepressant, SNRI

Mechanism: inhibition of NE and 5HT reuptake

Clinical use: depression

Contraindication: hepatic insufficiency, end stage renal disease

Adverse effects: nausea, dry mouth, constipation, diarrhea, vomiting, insomnia, dizziness, somnolence, sweating, SEXUAL DYSFUNCTION

Absorption: delayed by food
Distribution: plasma proteins
Metabolism: hepatic, lots
Elimination: 12 hrs
Term
bupropion
Definition
Class: antidepressant, heterocyclic

Mechanism: unknown, decrease nicotine craving

Clinical use: depression

Adverse effects: headache, nausea, tachycardia, restlessness, dry mouth, sweating, tremor, seizure at high doses

Elimiation: 20hr half-life
Term
mitrazapine
Definition
Class: antidepressant, heterocyclic

Mehcanism: blocks presynaptic a2 autoreceptors, increases NE transmission, blocks 5HT2 and 5HT3 receptors

Clinical use: depression

Adverse effects: antihistamine (sedative), increased appetite and weight gain
Term
phenelzine
Definition
Class: antidepressant, MAO-I

Mechanism: inhibits MAO (A&B), decrease monoamine breakdown; elevates modd, suppress REM, stimulate CNS

Clinical use: atypical depression with phobia or psychotic features

Adverse effects: HYPERTENSIVE CRISIS IF NOT AVOID TYRAMINE, orthostatic hypotension, dry mouth, blurred vision, weight gain, HEPATOTOXICITY, may precipitate mania in bipolar, use limited due to complicated dietary restriction

Absorption: oral
Distribution: readily cross BBB
Metabolism: P450 to active metabolite
Elimination: renal
Term
moclobemide
Definition
Class: antidepressant, new MAO-I

Mechanism: reversible inhibitors of MAO-A, safer, slightly less efficacious

Clinical indication: depression

Adverse effects: hypertensive crisis when combined with other anti-depressants or stimulants, migraine meds, certain herbs or cold meds

NOT APPROVED IN US
Term
st. john's wort
Definition
Class: antidepressant, herb

Mechanism: hypericin inhibits MAO-A and MAO-B, hyperforin inhibits 5HT/Ne/DA reuptake

Clinical indications: mild to moderate depression

Adverse effects: dizziness, rash, photosensitization, hypomania, autonomic arousal, serotoning syndrome slight risk
Term
lithium carbonate
Definition
Class: antidepressant

Mechanism: unknown, attenuates signaling via receptors coupled to PIP2, interferes with re-synthesis of PIP2

Clinical use: 1* BP, adjuvant to antidepressants for MDD

Contraindication: pregnancy - teratogenic

Adverse effects: GI, ataxia, confusion, convulsions, tremors, HYPOTHYROIDISM, RENAL TOXICITY, dry mouth, polydipsia, polyuria, leukocytosis

Absorption: oral, rapid
Distribution: wide
Elimination: kidney
Term
carbamazepine
Definition
Class: anticonvulsant

Mechanism: prolongs the inactivated state of Na+ channels

Clinical use: reduces symptoms during maanic and depressive episodes, seizures, trigeminal neuralgia

Adverse effects: acute intox that can lead to resp. depression stupor or coma; SEVERE LIVER TOXICITY, APLASTIC ANEMIA, AGRANULOCYTOSIS, drowsiness, ataxia, nystagmus, vomiting

ABsorption: oral, well
Metabolism: P450 system, INDUCES P450 ENZYMES, ACCELERATES ITS OWN METABOLISM
Term
valproic acid
Definition
Class: anticonvulsant

Mechanism: prolongs inactivated sate of Na+ channels; suppress Ca influx through T-type channels; may increase GABA concentrations in brain

Clinical use: bipolar disorder

Contraindication: pregnancy

Adverse effects: nausea, vomit, tremor, sedation, weight gain, liver toxicity

Absorpion: oral
Distribution: 90% plasma protein bound
Metabolism: extensively by liver P450s
Term
chlorpromazine
Definition
Class: antipsychotics

Mechanism: D2 receptor blockade; also blocks alpha1, histamine and ACh receptors

Clinical uses: schizophrenia, psychotic disorders, manic phase of BP

Adverse effects: RISK OF TARDIVE DYSKENSIA IS LOW, sedation, orthostatic hypotension, anticholinergic effect

Drug interactions: intensify responses to CNS depressants (anti-histamines, benzos or barbituates), can intensify response to anticholinergic drugs

Absorption: PO, IM or IV, high first pass, F oral = 30%
T1/2- biphasic, initial 2hrs, terminal 30hrs
Excretion: renal, as metabolites
Term
clozapine
Definition
Class: antipsychotics, atypical

Mechanism: D1 and D2 blockade; less D2 antag than typical antipsychotics, potent antagonist at some serotonin receptors

Clinical use: MOST EFFECTIVE DRUG FOR SCHIZOPHRENIA but reserved for pts who don't respond to others

Contraindication: other drugs that can suppress bone marrow fx (anticancer drugs)

Adverse effects: AGRANULOCYTOSIS, seizures, weight gain, myocarditis, sedation, orthostatic hypotension, anticholinergic effects

Absorption: rapid, oral
Distribution: 95% plasma protein bound
Metabolism: extensive
Excretion: feces and urine
T1/2 - 12 hrs
Term
haloperidol
Definition
Class: antipsychotics

Mechanism: D2 receptor blockade

Clinical use: Schizophrenia, psychotic disorders, Tourrette's syndrome

Adverse effects: EXTRAPYRAMIDAL EFFECTS FREQUENT, RISK OF TARDIVE DYSKINESIA IS HIGH, prolong QT interval, ARRHYTHMIAS

Absorption: PO(60%), or IM
Metabolism: extensive hepatic
Excrete: urine as parent drug and metabolite
T1/2-20hrs
Term
olanzapine
Definition
Class: antipsychotics, atypical

Mechanism: more potent antagonist at 5HT2 receptors than DA

Clinical use: schizophrenia, psychotic disorers

Adverse effects: sedation, orthostatic hypotension, anticholinergic effects, weight gain, hyperglycemia and diabetes induction

T1/2-21-54hrs
Term
quetiapine
Definition
Class: antipsychotics, atypical

Mechanism: antagonist at D2 and 5HT2 receptors; potent at alpha receptors

Clinical use: schizophrenia, other psychotic disorders

Adverse effects: weight gain, abuse potential

T1/2 - 6hrs
Term
risperidone
Definition
Class: antipsychotics, atypical

Mechanism: VERY HIGH AFFINITY AT D2 AND 5HT2 RECEPTORS, little to no anticholinergic actions

Clinical use: schizophrenia and psychotic disorders

Adverse effects: higher incidence of extrapyramidal effects at higher doses, prolongs QT, weight gain,

T1/2 - 20hrs
Term
ziprasidone
Definition
Class: antipsychotics, atypical

Mechanism: antagonist at D2 and 5HT2 receptors, moderate SSRI-like activity

Clinical use: schizophrenia and psychotic disorders

Adverse effects: prolong QT

T1/2 - 2.5hr IM, 7hr PO
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