Medications/Pharm Flashcards
MOA of Valproic Acid
Valproic acid increases Na+ channel inactivation and increases GABA concentration by inhibiting GABA transaminase.
MAO of Carbidopa →
inhibits DOPA decarboxylase and thereby prevents the peripheral metabolism of levodopa to dopamine before it can cross the blood–brain barrier
Tobacco smoking is a potent inducer of ________
CYP 1A2
Which antipsychotic is a serotonin 1A agonist and also has SNRI properties
Ziprasidone
blockade of the 5-HT 1A receptor
Carbamazepine is inducer of CYP _____ and ____
- Carbamazepine is inducer of CYP 2C19 and 3A4
How does cabamazepine interact with lamotrigene?
- Carbamazepine is inducer of CYP 2C19 and 3A4
- does not affect clozapine levels (but don’t use it because agranulocytosis risk)
- Will decrease warfarin, alprazolam, propranolol, citalopram levels
- Lowers lamotrigine by induction of glucuronidation 1A4
*
Buspirone works on _________
- Buspirone works on serotonin 1A partial agonist
- Can increase haloperidol levels ; takes 2-3 weeks to work ; can’t use with MAOis
WHich AED lowers efficacy of OCPs the most?
AEDs have the warning for lower oral contraception efficacy ; carbamazepine lowers OCPs the mos
best TCA for childhood enuresis
Imipramine
Memantine MOA
- Memantine → antagonist of NMDA → slows Ca++ influx (halt cell destruction)
cholinesterase inhibitors
Tacrine, donepezil, galantamine, rivastigmine
Bupropion is a CYP ________ _______
Bupropion is a CYP 2D6 inhibitor
- selective for MAO-B
Selegeline
Metabolism of Paliperidone vs Risperidone
- Paliperidone goes through the kidneys (80%); risperidone goes through liver to become paliperidone
Lithium toxicity Levels
- Mild/mod ______ → ________________________
- Mild/mod 1.5-2.0 → vomiting, abdominal pain, ataxia, dizziness, slurred speech, dry mouth
Lithium Toxiity:
- Mod/severe ______ → ________________________
- Mod/severe 2.0-2.5 → anorexia, muscle fasciculations, clonus, increased DTRs, other movements, seizures, delirium, circulatory failure
*
Lithium Toxiity:
- Severe → ______ → ________________________
Severe >2.5 → seizures, oliguria, renal failure, death
Atomoxetine
- NE reuptake inhibitor for ADHD
- takes 10 weeks to take effect
- once-daily
- ⇒dizziness, decrease appetite, dyspepsia
- carries black box for suicidality
- metabolized by liver and can be mixed with other stimulants
How dose Botulum Toxin work?
- Botulinum toxin works by blocking Ach release from presynaptic terminals (irreversible)
Wht is the surgery for severe, refractory OCD?
Surgery for OCD is anterior capsulotomy/cingulotomy (anterior limb of the internal capsule)
MEdications that INCREASE clozapine levels?
- Clozapine increased by cimetidine, SSRIs, TCAs, VPA, and erythromycin
MEdications that DECREASE clozapine levels?
- Carbemazepine and phenytoin will decrease clozapine levels