Pharmacology Nuggets Flashcards
Receptor responsible for antipsychotic induced weight gain
5HT2C
Receptor responsible for antipsychotic postural hypotension
Alpha-1 antagonism
High risk side effect of Bupropion
Seizures at doses >400mg a day
Mood stabilizers that cause rashes
Carbamazepine (10-15% benign maculopapular rash)
Lamotrigine
Mood stablizer that causes PCOS
Sodium valproate causes hyperandrogenism and provokes the development of PCOS
Antipsychotic most likely to cause QTc prolongation
Ziprasidone
Drug likely to cause visual hallucinations
Levodopa
Drug likely to cause halo of light around objects
Digoxin
Antipsychotic most likely to cause impotence/sexual side effects
Risperidone
SSRI that has the most anticholinergic SEs
Paroxetine
Alpha-2 adrenergic agonists used for short term opioid detoxification
Lofexidine
Clonidine
Mechanism of action of Atomoxetine
Selective inhibition of presynaptic norepinephrine transporter
Mood stabilizer that can be given as a loading dose in mania
Valproate
Mechanism of Carbamazepine’s autoinduction
Increasing CYP3A4
Active metabolites of amtriptyline and imipramine
Amtriptyline –> Nortriptyline
Imipramine –> Desipramine
Equation for the volume of distribution of a drug
Quantity of drug / plasma concentration at time of administration
Optimal plasma levels for TCAs: Nortriptyline, Imipramine and Desipramine
Nortriptyline 50-100 ng/ml
Imipramine 150-300 ng/ml
Desipramine 150-300 ng/ml
Most potent liver enzyme inducers
Phenytoin
Phenobarbitone
Primidone
Carbamazepine
Fluoxetine increases levels of 1) and enhances action of 2)
1) Haloperidol, carbamazepine and phenytoin
2) Oral anticoagulants and propanolol
Structural class of Buspirone
Azaspirone
Structural class of Bupropion
Aminoketone
Structural class of Flupenthixol and Zuclopenthixol
Thioxanthenes
Structural class of Droperidol and Haloperidol
Butyrophenones
1st line mood stabilizer for mixed affective and manic episodes
Sodium Valproate
Mechanism of action of Rivastigmine
A reversible and non-competitive AChE inhibitor
Mechanism of action of Memantine
NMDA antagonist
Reversible MAOis
Moclobemide and brofaromine
Discoverer of Lithium
Cade
Discoverer of Clozapine
Kane
Discoverer of Chlorpromazine
Delay and Deniker
Discoverer of Haloperidol
Janssen
Discoverer of Imipramine
Kuhn
Structural class of Risperidone
Benzisoxazole
Structural class of Amisulpride and Sulpride
Subsituted Benzamides
Structural class of Ziprasidone
Benzisothiazole
Structural class of Clozapine
Dibenzodiazepine
Structural class of Olanzapine
Thiobenzodiazepine
Drugs eliminated renally unchanged
Lithium, amisulpride, sulpride, gabapentin, acamprosate, amantadine
Best benzodiazepine for liver failure
Oxazepam - does not require hepatic oxidation
Benzodiazepines that undergo direct phase 2 metabolism
Lorazepam, Temazepam, Oxazepam
Drugs increased by Valproate’s competitive inhibition of their metabolism
TCAs especially clomipramine, Lamotrigine, Phenobarbitone
Least sedating/anticholinergic TCAs
Lofepramine, Nortriptyline
Treatment of anorgasmia associated with SSRIS
Cyproheptadine a sedating antihistamine
Indication and mechanism for Acamprosate
Used for EToH withdrawl, possibly works through glutamate antagonism
Pros and cons of Doxepin
Lower orthostatic hypotension, higher antihistaminic action
TCAs from most sedating to least
Trimipramine, Amitriptyline, Dothiepine, Imipramine, Lofepramine, Nortriptyline
Amisulpride vs. Sulpride mechanisms
Sulpride = pure D2 antagonist vs Amisulpride = D2/D3 antagonist
Antibiotic that acts an irreversible MAOi
Linezolid
TCA toxicity cause and treatment
Inhibition of fast inward Na channels in the heart. Treated with sodium bicarbonate.
Most toxic benzodiazepine
Alprazolam
Opioid than can cause serotonin syndrome with SSRIs
Pethidine/meperidine
Treatment for tyramine-MAOi hypertensive crisis
Phentolamine or phenoxybenzamine
Most risky TCAs for seizures/cardiotoxicity
Amitriptyline and dosulepin
SSRI with some cardiac risk
Citalopram
Treatment of Clozapine induced hypersalivation
Pirenziprine - M1/M4 antagonist Trihexyphenidyl Hyoscine Amitriptyline Benztropine Terazosin
Opioid that can cause QTc prolongation
Methadone
Abnormal Involuntary Movement Scale (AIMS) is used to measure
Tardive dyskinesia
Drugs associated with risk of cleft-palate
Lamotrigine
Diazepam
SSRIs
Best drug for atypical depression
MAOis
Flumazenil mechanism of action
Competitive antagonist and benzodiazepine receptor
Antidepressants with greatest CYP2D6 inhibition
Fluoxetine, Duloxetine
Safest mood stabilizer to use with oral contraceptives
Sodium Valproate
Effects of combining Sodium Valproate and Lamotrigine
Decreased Valproate levels, significantly increased Lamotrigine due to decreased clearance and competition for liver metabolism
Switching from MAOi to SSRI
Withdraw and wait 2 weeks
Specific side effect of Zopiclone
Metallic taste in mouth