Pharm Flashcards
Norepinephrine?
alterness
concentraiton
energy
Cause of depression?
unknown
Serotonin?
obession
complusion
memory
muscle constrictor
Dopamine?
reward
motivation
Tryptophan?
precursor for serotonin
Serotonin in the body?
10% in the CNS
90% in the gut - excess taken up by platelets –> vasoconstrictor
Not enough serotonin? (gut)
constipation
mood is not regulated
appetite is decreased
sleep is disrupted
Serotonin sickness?
like the flu + diarrhea + vomiting
Serotonin metabolized?
liver and kidney
How to select antidepressant?
PMH
FH
drug characteristics
costs
Timeline of depression?
relapses and remitting can occur
or may need the drugs forever and sx will never go away
Effectiveness of therapy?
takes time for drugs to kick in
50-60% of response rate
success is related to tolerance of ADR and effectiveness and tx resistance
General info for pts taking antidepressants?
do not just stop taking meds- take the whole therapy
there is a 2-3wk lag before drugs start working
early side effects of drugs will go away
sexual dysfxn (female and male)
young pts: mood may worsen and increase suicidality (b/c they gain energy instead of feeling tired all the time)
Antidepressant doses?
TITRATE!!
Antidepressant - drug withdrawal?
care when switching antidepressants (cross tapering)
may cx seizures
TAPER by 25% over 2-4wks
What are the SSRI antidepressants?
fluoxetine
sertraline
escitalopram
SSRI antidepressant?
inhibit reuptake of serotonin (primarily)
SSRI are most common drugs used for depression
DO NOT STOP ABRUPTLY
Which works better for anxiety?
SNRI»_space; SSRI
SSRI ADR?
suicidality GI upset CNS irritation sexual dysfxn wt gain prolonged QT hypersensitivity bleeding serotonin syndrome can be TIRED or WIRED (like benadryl)
Resolving ADR for SSRI?
drug holiday
giving viagra, etc - helps w/ erectile dsyfxn not libido
SSRI DI?
CYP 450 inhibitor
ADR duplication
protein bound drugs
What are the antidepressants SNRI?
duloxetine
venlafaxine
SNRI MOA?
inhibit reuptake of serotonin and norepinephrine
works effectively w/ GAD than SSRI
DO NOT STOP ABRUPTLY
SNRI ADR?
suicidality GI upset CNS irritation sexual dysfxn wt gain hypersensitivity bleeding serotonin sydnrome DIAPHROESIS HTN CRISIS MI
SNRI DI?
CYP450 inhibitor
AD duplication
MAOIs
Antidepressant - trycyclic?
amitriptyline
Amitriptyline MOA?
inhibits reuptake of serotonin and norepinephrine
anticholinergic - not first line
DO NOT STOP ABRUPTLY
Amitriptyline - ADR?
suicidality wt gain SEDATION ANTICHOLINERGIC EFFECTS: ORTHOSTASIS, SEXUAL DSYFXN CARDIAC ARGANULOCYTOSIS SEIZURES
Amitriptyline DI?
CYP450 subtrate
ADR duplication
Amitriptyline - avoid population?
urinary retention issue
MAOI MOA?
increases serotonin
half life is 2 wks
MAOI - ADR?
suicide CNS dry mouth wt gain orthostasis sexual dysfxn HTN CRISIS
Antidepressent SARI, sedative?
Trazadone
MAOI - DI?
MANY foods- thyromine (avacado, bananas, etc)
ADR duplication
serotonin syndrome
Trazadone?
5HT antagonist: works against increased serotonin effect (blocks signaling)
used more for insomnia than depression
Trazadone - labs?
monitor LFT
Trazodone ADR?
suicidality ANTICHOLINERGIC EFFECTS (orthostasis) SEDATION GI upset CNS irritation BACKACHE LIVER FAILURE cardiac hypersensitivity PRIAPISM serotonin syndrome erections for hours - painful
Trazodone DI?
CYP 450 substrate
ADR duplication
Bupropion?
antidepressant
weakly inhibits reuptake of DOPAMINE and norepinephrine
may promote release of DOPAMINE an norepinephrine
NOT likely to cx sexual dysfxn
NOT likely to cx withdrawal sx w/ abrupt stop of meds
Bupriopion - population?
obese
Bupropion ADR?
sucidality cardiac WT LOSS GI upset CNS irritation COLITIS PANCREATITIS HEPATOXICITY PANCYTOPENIA SEIZURES hypersensitivity
Bupropion DI?
CYP 450 substrate
ADR duplication
Benzodiazepine?
Diazepam
Lorazepam
Midazolam
Diazepam?
enchances GABA dependent Cl conductionn --> hyperpolaizes the ell long acting (15-20hrs) anxiety ad insomnia
Lorazepam?
enhances GABA dependent Cl conduction –> hyperpolarizes the cell
12-14 hrs
anxiety and insomina
Midazolam?
enhances GABA dependent Cl conduction –> hyperpolarizes cell
2-5 hrs
How does Dizepam, Lorazepam, and Midazolam reversed?
Flumazenil
Diazepam, Lorazepam, and Midazolam ADR?
CNS depression - sedation, drowsiness
tolerance
dependence
cardiopulmonary dz pts: respiratory/cardio depression
Diazepam, Lorazepam, Midazolam DI?
CYP 450 substrate
CNS depressants - ETOH
Barbiturates?
depressant
has a lot of bad side effects - benzodiazepine has better side effects
elderly: death rate is high
Zolpidem?
hypnotic agent
INSOMNIA for SHORT TERM
Zolpidem ADR?
daytime drowsness (esp in the morning) GI upset CNS irritation fatigue COMPLEX MANNERISM suicidality CHEST PAIN TACHYCARDIA hypersensitivity HEPATIC ENCEPHALOPATHY
Antipsychotic side effects?
wt gain
increase prolactin
sedation
Lithium?
antipsychotic
helps w/ manic and depression
Lithium - ADR?
narrow therapeutic window a lot of side effects acne hypothyroidism wt gain nasuea - improves w/ time hypersensitivity pseudo tumor cerbri
Buspirone?
anti anxiety
FULL 5HT agonist
partial agonist
NO effect on GABA binding
Buspirone ADR?
GI upset
CNS irritation
CARDIAC
Buspirone DI?
CYP450 substrate
risk of HTN crisis
ADHD?
over dx’d in children
Methylphenidate
dextroamphetamine/amphetamine
takes about a semester for drugs to kick in but SHOULD see SOME improvement w/in a month - titrate!
Methylphenidate?
inhibits reuptake of norepinpherine annd dopamine
peripheral effects are LESS than amphetamines
can be discontinued abruptly
long acting
Methylphenidate and Dextroamphetamine/amphetamine labs?
BP and ECG
wt check
Dextramphetamine/emphetamine?
inhibits reuptake of norepinephrine ad dopamine STIMULATE RELEASE OF NE, DA, 5HT AGONIZE CENTRAL 5HT RECEPTORS LESS peripheral activity but MORE POTENT MORE ADRs short acting
Dextroamphetamine/amphetamine ADR?
Gi upset wt loss CARDIAC - HTN AND TACHYCARDIA CNS irritation sudden death can occur
Dextroamphetamine/amphetamine DI?
phenothiazine (risk for psychosis)
HTN crisis
antihypertensives
Methyphenidate DI?
HTN crisis
antihypertensives
Methylphenidate ADR?
GI upset wt loss sleep disturbances behavioral motor tics HTN TACHYCARDIA DRUG DEPENDANCE/ABUSE
Can you stop ADHD meds abruptly?
not recommened but you can - esp if pts are not in school (weekends, vacations, etc)
Which ADHD has a black box warning?
methylphenidate