Anti depressants Flashcards
amine hypothesis of depression
1) reserpine: depletes NE, 5HT, DA and causes severe depression
2) acute mech of antidepressants: increase NE and 5HT
3) biological lag: 4-6 wks
neurotrophic hypothesis
BDNF needed for neuron survival and growth
BDNF found in CSF is decreased in depression
CREB, sprouts help neuron connection
neuroendocrine factors
steroid and corticotropin - reloading hormone levels are increased in depression
thyroid dysregulation
estrogen def
selective blockade of 5HT reuptake
no anti M, H1, alpha1 receptor
SSRIs
SSRIs
fluoxetine paroxetine - teratogenic sertraline citalopram fluvoxamine escitalopram
used: DOC for MDD, OCD, bulimia, anxiety, PMDD
SSRIs
toxicity - serotonin syndrome
potent inhibitors of hepatic microsomal oxidases p450
SSRIs
sweating, rigidity, myoclonus, hyperthermia, ANS stability, seizures
serotonin syndrome SE
TCAs
amitriptyline
imipramine
clomipramine
nonspecific blockade of 5HT and NE reuptake
TCAs
used: MDD, phobic and panic anxiety states, OCDs (clomipramine), neuropathic pain, enuresis (imipramine)
TCAs
toxicity the 3 Cs of TCAs
coma
convulsions
cardiotoxicity
hypertensive crisis with MAOI
serotonin syndrome
prevent antihypertensive action of A2 and guanethidine
drug interactions of TCAs
SE of TCAs
A1 histamine blockade anti cholinergic seizures Heart - quinidine - like actions: QRS widen, QT prolong, arrhythmias
BPH, narrow angle glaucoma, recent MI, HB and epilepsy
CI of TCAs