STIMULANTS Flashcards
treatment failure for ADHD is the result of what?
inappropriate drug management rather than inactivity of the drug
do the serum drug levels correlate with the adequacy of response?
NO
what are the four phases of management in treating ADHD?
- counseling
- titration
- maintenance
- Potential termination
describe the counseling phase of adhd therapy?
- explaining why pt needs meds and outlining the pros and cons
- tell parents about behaviors to monitor, potential side effects and how to deal with them
- advise that both dose and timing will change as treatment progresses; with adequate activity a move is made from short-acting to sustained release preparations
how do you usually figure out which stimulant to use?
trial and error b/c there’s no real difference b/w the initial response of drugs
what are the most common side effects of stimulants?
appetite suppresion delayed sleep onset wearing off phenomenon tics depression social withdrawal
what do you do if pt has intractable tics with stimulant therapy?
stop stimulant and consider adding or substituting another agent (like centrally acting alpha-agonist) with consult
describe the maintenance phase of stimulant therapy
less doc visits
still need to see doc every so often for refills
monitor med effects and progress
amphetamines MOA
releases DA & NE
atomoxetine MOA
Selective NE reuptake inhibitor centrally & peripherally
methylphenidate MOA
block reuptake of DA & NE
guanfacine MOA (as a stimulant)
believed due to regulation of NE release from locus ceruleus
clonidine MOA
shows improved prefrontal cortical function through post-synaptic alpha-2-receptor agonist effects in the PFC
haloperidol MOA
blocks post-synaptic D2 receptors (typical high potency anti-psychotic)
what is the clinical utility of short-acting amphetamines?
used as initial treatment in small kids
what is the clinical utility for longer acting amphetamines?
more convenient
confidential
greater adherence
more problems with appetite and sleep
describe the outcome of using drugs that alkalinize the urine (acetazolamide, NaBicarb) with amphetamine/dextroamphetamine
alkalinizing the urine favors reuptake of drug in renal tubules; increases the drug levels
using ammonium chloride can have what outcome with amphetamine thereapy?
acidifies the urine favoring renal elimination; decreases the serum drug levels