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Antipsychotic Pharm
Antipsychotic--Pharm
Question | Answer |
---|---|
Typical Drugs used to treat Schizphrenia ? | *Haloperidol *Chlorpromazine *Thioridazine *Fluphenazine |
Atypical Drugs for Schizophrenia ? | *Risperidone *Clozapine *Quetiapine *Olanzapine *Ziprazadone *Aripiprazole |
Typical antipsychotic drug receptor affinity and side effects ? | * higher affinity for Dopamine receptor over Sreotonin * extrapyramidal side effects (EPS) |
Atypical antipsychotic drug receptor affinity and side effects ? | * higher affinity for serotonin receptor over dopamine *NO extrapyramidal side effects (EPS) |
Antipsychotic drug metabolism ? | *CYP2D6, 1A2, 3A4 |
Excretion of the drugs ? | * some remain in the system and ar eexcreted long times after last treatment with that drug (Haloperidol and chlorpromazine) Typicals |
Antipsychotic drugs and EEG ? | * watch use is seizure prone ppl, bc they can lower the seizure threshold and cause them |
Antipsychotic drugs and CV side effects of Typical drugs? | * Lots * Thioridazine - long QT and elevated ST segments *Haloperidol - torsades de pointes * orthostaticHTN and Tachy |
Antipsychotic drugs and CV side effects of Atypical drugs? | * increased QT interval - Ziprasidone and Quetiapine |
Endocrine Side Effects ? | * can lower dopamine and cause prolactinemia |
Non-psychiatric indications for antipsychotics ? | * anti-emetics and H1 blocking to treat pruritus |
Give to treat Positive Sx ? | * Typical and Atypical Drugs |
Give to treat Negative Sx ? | * Atypical Drugs - see way lower adverse side effects |
Why Typicals are used more despite the EPS effects ? | * cheaper bc they are older |
Usually used in non-compliant patients ? | * IM injections bc they last longer than the oral routes |
Best guide on drug selection ? | * patients past drug response |
For typical drugs, what is preferred ? | * high potent drugs (halo.) |
Minimal side effects and lower risk of tardive dyskinesia, and why we see an increased use in it ? | * Risperidone |
Indicated to reduce the risk of suicide in schizophrenia or as a last resort medication | * Clozapine |
Drug Combos ? | * usu combine with other drugs to control other issues, like depression, anxiety, manic, etc |
Neuro Side Effects ? | * usu the Typicals * Extrapyramidal Side Effects (EPS)- Tremor-Slurred speech-Akathisia-Dystonia-Anxiety -Distress-Paranoia-Bradyphrenia |
If neuro side effects continue for a while ? | * Parkinson’s Syndrome - tmt=Benztropine or trihexylphenidyl |
Akathisia tmt ? | * Sedative antihistamine with anticholinergic properties (diphenhydramine) |
Acute dystonic reactions tmt ? | * Sedative antihistamine with anticholinergic properties (diphenhydramine) |
Late-occurring syndrome of abnormal choreathetoid movements that are also a side effect? | * Tardive Dyskinessia - can be treated early on, so recognize it......late stages are untreatable |
Usu drugs that cause Tardive Dyskinessia, and what to switch them to? | * Caused by: Typicals and possibly risperidone ** Patients should be switched to quetiapine or clozapine (atypicals), and be taken off TCADs, and given a benzo to increase GABA activity |
Cause seizures ? | * Chlorpromazine (RARE) * Clozapine (de novo seizures) |
ANS Side Effects ? | * Antimuscarinic Activity ---- * Urinary retention, constipation, dry mouth * Orthostatic hypotension or impaired ejaculation (chlorpromazine or mesoridazine) |
Causes Deposits in cornea and lens ? | * chlorpromazine |
Causes Deposits in retina ? | * thioridazine - associated with browning of vision |
Metabolic Side Effects ? | * Weight gain (clozapine or olanzapine) |
Reproductive Side Effects ? | *WOMEN - false + preg tests, amenorrhea, increased sex drive * MEN - low sex drive and gyno |
Drug that causes AGRANULOCYTOSIS ? | * clozapine - starts between weeks 6 - 18...Weekly blood counts for first 6 months Every 3 weeks after |
Tmt of Side Effect Neuroleptic Malignant Syndrome (NMS), which is rigidity, no sweating, fever, high EPS Sx ? | * diazepam or dantrolene and switch to Atypical Drug |
Drugs that cause Cardiotoxicity Side Effects ? | * Thioridazine - T waves and torsades * Ziprasidone - QT prolongation * Clozapine - assoc. w/ myocarditis |
Antipsychotics in pregnancy? | * Potential teratogenic risk (small) |
Overdoses ? | *Rarely fatal EXCEPT: mesoridazine and thioridazine * also causes Ventricular tachyarrythmias |