Antipsychotics Flashcards
antipsychotics - uses and side effects
All antipsychotics have ________ affinity for _______
comparable, dopamine D2 receptors
D2 receptor affinity is ______ correlated with antipsychotic efficacy
highly
all antipsychotics require _______ of _______ for dopamine receptors for efficacy
blockade, ~65%
name three D2 partial agonists
aripiprazole, brexpiprazole, and caripraszine
what generation antipsychotics have higher risk of EPS?
first generation
first generation antipsychotics have _____ efficacy with atypical agents
equal
Name the six high-potency first generation antipsychotics
Droperidol (Inapsine) Fluphenazine (Prolixin) Haloperidol (Haldol) Perphenazine (Trilafon) Pimozide (Orap) Thiothixene (Navane)
Name the three low-potency first generation antipsychotics
Chlorpromazine (Thorazine)
Loxapine (Loxitane)
Thioridazine (Mellaril)
First generation high vs low potency antipsychotics
High potency -
More EPS
Less sedating
Less anticholinergic
Low potency:
Fewer EPS
More sedating
More anticholinergic
First Generation Antipsychotics: Short-acting Injectable (IM or IV)
Haloperidol (Haldol)
Chlorpromazine (Thorazine)
First Generation Antipsychotics: Long-acting Injectable
Haloperidol decanoate (Haldol-D) Fluphenazine decanoate (Prolixin-D)
Second Generation (Atypical) Antipsychotics - list of eleven
Olanzapine (Zyprexa) Quetiapine (Seroquel) Risperidone (Risperdal) Ziprasidone (Geodon) Clozapine (Clozaril) -- second-line use only Aripiprazole (Abilify) Asenapine (Saphris) Brexpiprazole (Rexulti) Iloperidone (Fanapt) Lurasidone (Latuda) Paliperidone (Invega)
Second Generation Antipsychotics are first-line agents for: (5 items)
- Psychosis of any type
- Schizophrenia or schizoaffective disorder
- Acute mania
- Depression with psychotic features
- Behavioral dyscontrol
Second Generation Antipsychotics: Short-acting Injectable formulations (IM only)
Olanzapine (Zyprexa)
Ziprasidone (Geodon)
Second Generation Antipsychotics: Long-acting Injectable (LAI)
Risperidone (Risperal Consta; Perseris) Paliperidone palmitate (Invega Sustenna; Trinza) Olanzapine pamoate (Relprevv) Aripiprazole (Abilify Maintena; Aristada)
Antipsychotics: common side effects
Sedation Akathisia (restlessness) Movement disorders Weight gain and other metabolic problems Sexual dysfunction
What does metabolic dysregulation resulting from antipsychotics look like?
Weight gain Type 2 diabetes Elevated LDL cholesterol Elevated triglycerides Decreased HDL cholesterol Diabetic ketoacidosis
Antipsychotics: Relative Risk of Metabolic Complications
High:
Clozapine/Olanzapine/Low Potency FGAs
Medium: Quetiapine/Risperidone/Paliperidone/Iloperidone/Asenapine/High Potency FGAs
Low:
Aripiprazole/Brxpiprazole/Lurasidone/Ziprasidone
Antipsychotics - Movement Disorders (3)
Extrapyramidal symptoms (EPS) - stiff, rigid muscles - slow movements - muscle cramps Akathisia Tardive Dyskinesia
Antipsychotics - Relative Risk of EPS
[Insert graph - High potency FGAs worst, Quetiapine/Iloperidone/Clozapine rare]
All antipsychotics carry ______ .
risk
Antipsychotics all-cause mortality relative risk for dementia patients is _____.
1.4 - 1.7
Antipsychotics cardiac mortality relative risk is _____ and ______.
1.3 - 2.5, dose-dependent
Relative risk of antipsychotics is ________ for younger patients
at least as high
tardive dyskinesia - define
“Late bad movements” - writhing movements of the face, limbs, or body
risk of tardive dyskinesia per year of exposure to SGAs, FGAs
0.5% risk per year exposure to SGAs
7% risk per year of exposure to FGAs
risk of tardive dyskinesia ________ with age
increases dramatically
Tardive dyskinesia: treatment
- Reduce antipsychotic dose and duration of treatment
- Clozapine
- Medications: Valbenazine (Ingrezza) or Deutetrabenazine (Austedo) –> reduce dopamine uptake into presynaptic vesicles
Clozapine (Clozaril): Side effects (6)
Severe side effects:
- sedation
- weight gain
- anticholinergic effects
- Hypotension (limiting factor during titration)
- severe neutropenia
- increased seizure risk (2-6%)
Antipsychotics differ in ________ and _____________.
Side effects and routes of administration.
Summary of CATIE trial:
Schizophrenia patients stayed on olanzapine longer than other agents, but have more weight gain and metabolic problems.
List of Mood Stabilizers
Lithium
Vanticonvulsants:
- Valproic acid (Depakote, Depakene)
- Carbamazepine (Tegretol)
- Lamotragine (Lamictal)
- Oxcarbazepine (Trileptal)
- Topiramate (Topamax)
Mood stabilizers are primarily effective at treating what?
Primarily effective in treating and preventing manic episodes.
Frequently used for impulsivity, agitation, and aggression in dementia and brain injury patients; augmentation of other agents.
Lithium - highly effective for __________, less effective for ________ and ________.
Preventing mania; depression and psychosis
Short-term side effects of lithium
Tremor, nausea, diarrhea, sedation, polydipsia/polyuria
Long-term side effects of lithium
Hypothyroidism and renal insufficiency
What is the range for lithium levels?
0.7-1.2 mEq/L
What does lithium reduce overall?
Reduces suicide risk overall (RR 0.26)
Reduces overall death rate (RR 0.42)
What is the preferred mood stabilizer for women of childbearing years?
Lithium.
1.65% adjusted risk ratio (2.4% risk) for Ebstein’s anomaly (a right ventricular outflow tract obstruction defect)
Anticonvulsants: highly effective for….?
Preventing mania, somewhat effective for treating mania, rapid cycling, agitation, aggression
Common side effects of anticonvulsants:
Sedation Ataxia Blurred vision Dyspepsia Dizziness
Rare side effects:
- bone marrow suppression and aplastic anemia (carbamazepine)
- hepatotoxicity (especially valproic acid)
Agents for bipolar depression
Lurasidone
Olanzapine + fluoxetine
Quetiapine
Others possible effective:lithium, lamotrigine
Names of amphetamines
Adderal
Dexedrine
Brand name of methylphenidate?
Ritalin
Brand name of modafinil?
Provigil
Psychostimulants: name the types
Amphetamines (Adderal, Dexedrine) Methylphenidate (Ritalin) Modafinil (Provigil) Pemoline (Cylert) Atomoxetine (Strattera) **nonstimulant attention enhancer
What do amphetamines, methylphenidate (MPH), and pemoline do?
Enhance dopamine release
What is modafinil’s mechanism of action?
May inhibit GABA-mediated neurotransmision
What does atomexetine do?
Blocks reputake of norepinephrine
Indications for psychostimulants
ADHD
Narcolepsy
Excessive daytime somnolence
Side effects of psychostimulants:
Anxiety Insomnia Weight loss Decreased growth rate Abuse/dependency
Major Neurotransmitters in Psychiatry: Dopamine
Psychosis, muscle control
Major Neurotransmitters in Psychiatry: Serotonin
Depression, anxiety, sleep
Major Neurotransmitters in Psychiatry: Norepinephrine
Depression, anxiety