stimulants Flashcards
methylxanthines
naturally occurring alkaloids
caffeine ADME
oral absorption (30mins)
crosses BBB
crosses placenta
hepatic (CYP1A2)
caffeine MOA
adenosine receptor antagonist
adenosine = inhibitory NT
increase NT release
caffeine effects
increases alertness
vasoconstriction
inhibits allergic histamine release
caffeine dependence
withdrawal: headache, fatigue, impaired psychomotor performance, depression
caffeine use
headache
neonatal apnea
caffeine Rx interactions
quinolone ABX
inhibits metabolism of antipsychotics
amphetamine
50:50 d and l amphetamine
destroamphetamine
d amphetamine
methamphetamine
amphetamine + methyl group
amphetamine ADME
oral absorption (1-3hr)
crosses placenta
crosses BBB
hepatic metabolism
amphetamine MOA
release NE and DA through exchange diffusion
amphetamine effects
low dose: wakefulness
high dose: stereotypy
cardiac stimulation
amphetamine dependence
tolerance builds rapidly
withdrawal is not life threatening
amphetamine use
ADHD
narcolepsy
ineffective for long-term weight loss
amphetamine SE
chronic use: paranoid psychosis
arteritis obliterans
amphetamine Rx interactions
MAO inhibitors
tricyclic antidepressants
methylphenidate ADME
oral absorption (1-3hrs)
crosses placenta
hepatic metabolism
methylphenidate MOA
blocks DA reuptake
methylphenidate use
ADHD
narcolepsy
methylphenidate SE
few CV effects
methylphenidate Rx interactions
MAO inhibitors
tricyclic antidepressants
methylphenidate BBB
chronic use leads to dependence
psychotic episodes can occur
withdrawal: severe depression
atomoxetine MOA
blocks NE reuptake