XL1 [Rx +] Flashcards
Albuterol
MOA (2)
[β2🟢] > [β1🟢]
agonist
for acute asthma
Albuterol
Indication
acute asthma
Salmeterol
Indication (2)
- chronic asthma
- chronic COPD
Salmeterol
MOA (2)
[β2🟢] > [β1🟢]
agonist
= chronic asthma / chronic COPD
doButamine
Indication (2)
- HF
- cardiac stress testing
doButamine
MOA (3)
- [β1🟢] > [β2🟢]
- [general α🟢]
Dopamine
MOA (4)
{([D1🟢 = D2🟢] >[general β🟢] > [general α🟢*]}
[inotropic & chronotropic (α)] predominates at high doses
Dopamine
Indication (3)
1.cardiogenic shock
2.HF
3.unstable bradycardia
{([D1🟢 = D2🟢] >[general β🟢] > [general α🟢]}⼀{HIGH dose → INC (α) effects }
Epinephrine
MOA (2)
- [(general β🟢{low concentration}]
> - [general α🟢{HIGH CONCENTRATION}]
“with low effort you’ll get a B….with HIGH EFFORT YOU’LL GET AN A”
✏️Epi is stronger at β2🟢 than NorEpi is at β2🟢
Epinephrine
Indication (6)
- ANAPHYLAXIS
- asthma
- angle-open glaucoma
- arrest (cardiac arrest)
- [a heart block]
- [A low bp (shock)]
[(general β🟢 ⬅︎ ⬇︎ Epi ⇪ → general α🟢]
“with low effort you’ll get a B….with HIGH EFFORT YOU’LL GET AN A”
Isoproterenol
MOA (2)
[(β1🟢 = β2🟢)]
NorEpinephrine
MOA (3)
[(α1🟢 > α2🟢 > β1🟢)]
NorEpinephrine
Indication
hypOtension(but note: NE⬇︎renal perfusion)
[(α1🟢 > α2🟢 > β1🟢)]
📝Epi is stronger at β2🟢 than NorEpi is at β2🟢
Isoproterenol
Indication
electrophysiologic eval of tachyarrhythmias🛑note: can worsen ischemia!
[(β1🟢 = β2🟢) ]
Phenylephrine
MOA (2)
[α1🟢] > [α2🟢]
([α1🟢] vasoconstriction can → [baroreceptor-reflex mediated bradycardia])
Phenylephrine
Indication (3)
- hypOtension
- myDriasis for ocular procedures
- rhinitis(PNE is also a decongestant)
[(α1🟢 > α2🟢)]
Amphetamine
MOA (2)
Indirect Sympathomimetic via:
1. [NE🔻reuptake inhibitor]
2. releases stored NE🚰
[InDirect Sympathomimetic] –(🔻 [⇪NE catecholamine]
Ephedrine
Indication (3)
- Nasal Decongestant
- urinary incontinence
- hypOtension
InDirect Sympathomimetic via [⇪ NE/E catecholamines]
Cocaine
MOA
[(NE🔻reuptake inhibitor) InDirect Sympathomimetic]
→ ⇪ adrenergic NE → ⇪ Sympathetic NS
❗️NEVER GIVE β🟥 if cocaine intoxication suspected since this may → unopposed α activation
Ephedrine
MOA
[(releases stored NE🚰) InDirect Sympathomimetic]
→ ⇪ adrenergic NE → ⇪ Sympathetic NS
Clonidine
MOA
[α2🟢]
sympatholytic
📝DECREASES Peripheral vasoconstriction CENTRALLY (inhibits sympathetics) but will have SOME INC peripheral vasoconstriction by acting directly in the PERIPHERAL BODY also
Clonidine
Indication (3)
- HTN Urgency
- ADHD
- Tourette syndrome
[α2🟢 sympathoLytic]
(does not ⬇︎Renal blood flow)
Clonidine
Toxicity (5)
- CNS depression
- [pupillary depression (miosis)]
- [cardiac depression (bradycardia)]
- [respiratory depression]
- vascular depression (hypOtension)
[α2🟢 sympathoLytic] ⼀ “Clonidine makes me depressed”
(does not ⬇︎Renal blood flow)
α-methyldopa
MOA
_________________
Indication
[α2🟢 sympathoLytic]
_________________
HTN in pregnancy
α-methyldopa
Toxicity (2)
can →
1. [⊕DAT hemolysis]
2. [SLE-like syndrome]
[α2🟢 sympathoLytic]
DAT = [Direct_Coombs AntiHumanglobulin Test]
pheNOxybenzamine
MOA
_________________
Indication
iiRREVERSIBLEgeneral α🟥
_________________
[Px for HTN catecholamine crisis] in [Pheochromocytoma resection]
given preop
[(pheNOxybenzamine) = NO reversing ]
phentolamine
MOA
_________________
Indication
REVERSIBLEgeneral α🟥
_________________
[Px for HTN catecholamine crisis] in [MAOI pts who eat tyramine containing food]
“OF COURSE THIS TOLL BOOTH TICKET IS REVERSIBLE!”
pheNOxybenzamine and phentolamine
side effects (2)
- orthostatic hypOtension
- reflex tachycardia
[DEPT”-osin “]
MOA
α1🟥
🔎{[DEPT“-osin “] = DoxazOSIN \ tErazOSIN \ PrazOSIN \ TamsulOSIN}
[DEPT”-osin “]
Indication(s) (3)
[DEPT”-osin “]
1. [BPH Urinary sx (DEPT)]
2. [PTSD (P)]
3. [HTN (DEP)]
α1🟥
🔎{[DEPT“-osin “] = DoxazOSIN \ tErazOSIN \ PrazOSIN \ TamsulOSIN}
Mirtazapine
MOA
α2🟥
Mirtazapine
Indication
Depression
α2🟥
Mirtazapine
Side Effects (3)
- sedation
- HLD
- hunger
α2🟥
[DEPT”-osin “]
Side Effects (3)
DoxazOSIN \ tErazOSIN \ PrazOSIN \ TamsulOSIN
[DEPT”-osin “]
1. [1st dose orthostatic hypOtension (DEPT)]
2.[dizziness (DEPT)]
3.[HA (DEPT)]
α1🟥
{[DEPT“-osin “] = DoxazOSIN \ tErazOSIN \ PrazOSIN \ TamsulOSIN}
Receptors are divided into [5 major groups (CADHV)]
Describe the 2 types of Cholinergic receptors
▶Nicotinic (autoNomic vs neuroMuscular): ACh Receptors that are Na+/K+ channels
▶Muscarinic (M1,M2,M3,M4/M5): ACh Receptors that are {[G protein coupled R (M1,M2,M3 require 2nd messenger systems [q|i|s])}
function
α1(3)
sympathetic Receptor
[Vascular smooth muscle ctn (vasoconstricts)]
[Internal Urethral Sphincter ctn & Intestinal ctn]
[Dilator of pupil (myDriasis)]
“Give me the alpha 1 VID…”
📖Dilates pupil via [contracts pupillary Dilator m (myDriasis)]
🔎ctn = contraction
Receptors are divided into [5 major groups (CADHV)]
Describe the 2 types of Adrenergic receptors
▶αlphaadrenergic : Sympathetic NE Receptors (α1, α2 requireq|i|s2nd messenger)
▶βetaadrenergic: Sympathetic NE Receptors (β1, β2 requireq|i|s2nd messenger)
Name the 5 major Receptor groups
(CADHV)Receptors
Cholinergic
[Adrenergic SYMPATHETIC]
Dopaminergic
Histaminergic
Vasopressin
function
α2(5)
Receptor
⇪ Coagulation (via ⇪ Platelet aggregation)]
_________________
[⬇︎lipolysis (⬇︎fat breakdown)]
⬇︎aqueous humor production
[⬇︎sympathetic (via neg feedback)]
[⬇︎sugar cell entry (via ⬇︎ INSULIN release)]
“…Give her the {αlpha 2 Class}”!
function
β1(4)
sympathetic Receptor
⇪ Contractility Heart
⇪ Rate Heart
[⇪Adipocyte lipolysis]
⇪ Kidney RENIN release
“* βeta1 ⇪ CRAK*”
function
β2 (7)
sympathetic Receptor
⇪ {[VasoDilates autonomic smooth m] [Tremors somatic skeletal m]}
⇪ Aqueous humor production
[⇪BronchoDilation]
[⇪Uterine Relaxation (tocolysis)]
[⇪ Lipolysis & Liver Glycogenolysis]
⇪ Insulin release
⇪ Ciliary m Relaxation
“…βeta2 ⇪ VABULIC!!”
👓gProtein: (s)
function
M1 (2)
ParaSympathetic Receptor
- CNS
- ENS
“
👓gProtein: (q)
🔎ENS = Enteric Nervous System
function
M2 (2)
ParaSympathetic Receptor
- ⬇︎HR
- ⬇︎Heart Contractility
👓gProtein: (i)
function
M3 (6)
ParaSympathetic Receptor
- [Gut peristalsis ⇪]
- [Accommodation (contracts ciliary m)]
- [Miosis (contracts pupillary sphincter m)]
- Bladder contraction
- [Lung contraction (bronchoconstriction)]
- [Exocrine secretion (salivary/lacrimal/gastric acid)]
“M3s took a huge GAMBLE”
👓gProtein: (q)
function
D1
Receptor
renal vasoDilation
👓gProtein: (s)
function
D2
Receptor
inhibits nerve terminal adenyl cyclase = modulates (especially brain) NTS release
👓gProtein: (i)
function
H2
Receptor
⇪ Gastric acid secretion
👓gProtein: (s)
function
H1 (6)
Receptor
- ⇪ Production of nasal mucus
- ⇪ Production bronchial mucus
- [⇪ Permeability vascularly → edema]
- ⇪ Pruritus
- ⇪ Petit breathing (bronchoconstriction)]
- ⇪ Pain
👓gProtein: (q)
function
V1
vasopressin Receptor
vasoconstriction
👓gProtein: (q)
function
V2
vasopressin Receptor
⇪ H2O permeability&reabsorption in renal CD
👓gProtein: (s)
Name the 3 types of opioid receptors
MOA of opioid receptors (4)
[morphine|enkephalin |dynorphin opioid Receptors
_________________
{[opens K+ channels] and [closes Ca+ channels]}
→ [⬇︎synaptic transmission]
→ {⬇︎release of [ACh/norEpi/5HT/glutamate/substance-P]}
(TOXICITY → somnolence, miosis, bradypnea, constipation, Addiction )
Butorphanol
MOA (2)
[dynorphinopioid🟢] + [morphine (partial) opioid R agonist]
has less respiratory depression than FULL opioid R agonist
note: OD not easily reversed with nalaxone
Tramadol
MOA (3)
- [very weak opioid🟢]
- [5HT🔺reuptake inhibitor]
- [NorEpi🔺 reuptake inhibitor]
(TOXICITY → seizure, serotonin syndrome + same as other opioid TOX)
Ethosuximide
MOA
[(Thalamic)T-type Ca+ channel Blocker]
Benzodiazepine
MOA
⇪ GABAA effect
Phenytoin
MOA
Na+ channel inactivation(zero order kinetics)
✏️ IV requires Fosphenytoin
MOA for the [1st line tx of trigeminal neuralgia]
Carbamazepine
[⇪ Na+ channel inactivation]
✏️also used for: simple partial/complex partial/GTC
MOA for the anti-epileptic also used to treat bipolar depression (2)
Valproic acid
1. [ ⇪ Na+ channel inactivation]
2. [inhibits GABA transaminase → ⇪ GABA concentration]
MOA for anti-epileptic also used to treat peripheral neuropathy (2)
GABApentin
1. [inhibits high voltage gated Ca+ channels]
2. GABA analog
(indications: peripheral neruopathy, postherpetic neuralgia, simple szure, complex szure)
MOA for the anti-epileptic also used to prevent Migraine HA (2)
Topiramate
1. [Na+ channel blocker] antiepileptic
2. [ ⇪ GABA effect]
Lamotrigine
MOA
_________________
notable precaution?
[Na+ channel blocker] antiepileptic
_________________
[(must be titrated slowly) ⼀otherwise possible → Stevens-Johnson syndrome]
Levetiracetam
MOA
unknown
(antiepileptic that possibly modulates GABA and glutamate)
TiaGabine
MOA
_________________
Indication (2)
[GABA🔻reuptake inhibitor] antiepileptic
_________________
1. simple partial seizure
2. complex partial seizure
VigaBatrin
MOA
_________________
Indication (2)
[iiRREVERSIBLYinhibits GABA transaminase ➜ ⇪ GABA ] antiepileptic
_________________
1. simple partial seizure
2. complex partial seizure
Describe cp for Steven Johnson Syndrome (3)
_________________
Which drugs are known to cause Steven Johnson Syndrome? (4)
{[malaise and fever] –(rapid)–> [(ocular/oral/genital) erythematous/purpuric macules] → [epidermal necrosis and sloughing]}
_________________
1. [antiepileptics (esp. lamotrigine)]
2. allopurinol
3. sulfa
4. PCN
Steven Johnson has epileptic allergy to sulfa and PCN
What is the difference in MOA between Barbiturates and Benzodiazepines
B(A)RB = potentiates GABAA by ⇪ dur(A)tion of [GABA Cl-channel] opening
_________________
B(E)NZO =
1. potentiates GABAA by ⇪ fr(E)quency of [GABA Cl- channel] opening
2. ⬇︎REM sleep
3. ATOM are short acting benzo ➜ addictive!
(ATOM = Alprazolam/Triazolam/Oxazepam/Midazolam)
Nonbenzo hypnotics act as ⬜ and the 3 primary examples are ⬜
[(BZ1 GABA subtype) R agonist]; Zolpidem/Zaleplon/esZopiclone
✏️rapid hepatic metabolism = unlike other sedative-hypnotics, day after psychomotor depression with few amnestic effects
In Anesthesia, drugs with high blood/lipid solubility have ⬜ induction and ⬜ potency
slow; high
Define M.A.C. in terms of anesthesia
Minimal Alveolar Concentration (of anesthesia) required to prevent 50% of subjects from moving after noxious stimuli
..so [potency = 1/MAC]
Name and briefly describe each of the 5 [IV anesthetics]
[Barbiturates (Thiopental)] = high lipid solubility = high potency = rapid brain entry = use in short surgical procedures
_________________
[Benzodiazepine (Midazolam)]] = ⭐popular for endoscopy ⼀but may → postop bradypnea (tx = flumazenil)
_________________
[Ketamine/Arylcyclohexylamines] = [NMDA R Blocker PCP analog] → dissociative anesthesia
_________________
Opioids(Morphine|fentanyl)
_________________
PropoFOL = potentiates GABAA = rapid anesthesia induction, ICU sedation
“B. B. King on OPIOIDS PROPOses-FOLgers”
Name and describe the 6 local anesthetics
“BLM locally anesthetizes CPT”
“BLM = Amides (will have 2 i)
BupivAcaine
LIdocaine
MepivAcaine
_________________
“CPT” = Esters”
Cocaine
Procaine
Tetracaine
Succinylcholine
MOA
[strongACh R agonist] → blocks (by binding tightly to ) [NMJ postsynpatic ACh R] → sustained depolarization → prevents [NMJ action potential] → prevents muscle contraction = paralysis
Toxicity = HYPERKFC
how does reversal of Succinylcholine work? (2)
[phase 1 PD] = no antidote
= (🛑[cholinesterase inhibitors] will exacerbate block}
_________________
[phase 2 RD] = (✅give [cholinesterase inhibitors])
=ACh R have repolarized now ⼀but still desensitized
📖
[phase 1 Prolonged Depolarization] =ACh R are bound tight by Sux and undergoing PD = no antidote = (🛑[cholinesterase inhibitors] will exacerbate block}
_________________
[phase 2 Repolarized (but) Desensitized] = ACh R have repolarized now ⼀but still desensitized = (✅give [cholinesterase inhibitors]) →flood and resensitize R with ACh substrate
Succinylcholine
Toxicity (3)
- [HYPER K+]
- [HYPER Fever (MMalignant Hyperthermia)]
- [HYPER Ca+]
“HYPERKFC”
There are 2 types of paralytic agents: depolarizing vs nondepolarizing
a: describe MOA for nondepolarizing paralytic drugs
_________________
b. describe reversal process (2)
{tubocurarine or [(⼀curium) drugs]} = nondepolarizing competitive inhibitors against ACh for [NMJ postsynaptic ACh R]
_________________
Reversal =
▶give [AChE inhibitors(neostigmine/edrophonium) ] → reverses blockade
▶but (neostigmine) may also cause [acute cholinergic tox (DUMBBELSS)] = co-admin with Atropine
Local Anesthetics
MOA (4)
“BLM locally anesthetizes CPT”
- [preferentially blocks activated Na+ channels] = targets & blocks rapid firing neurons = inhibits depolarization of highly active (painful) tissue
- infected tissue requires ⇪ local anesthesia*
- order of loss = PETS (1st Pain → tEmp → Touch → last preSsure) and [myelinated small] > unmyelinated LARGEa]}7
- give with epinephreine vasoconstrictor = [enhances local action (by preventing systemic circulation)] +
“BLM locally anesthetizes CPT”
Local Anesthetics
Toxicity (6)
“BLM locally anesthetizes CPT”
- [CNS ❌]
- [CV❌(bupivacaine)]
- [arrhythmias(Cocaine)
- [methemoglobinemia(benzocaine)]
- HTN
- hypOtension
✏️(if allergic to [*ester*local anesthetic] give [*amide*local anesthetic])
Dantrolene
MOA
_________________
Indication (2)
prevents release of Ca+ from [sk muscle sarcoplasmic reticulum]
_________________
1. [MMalignant Hyperthemia]
2. [Neuroleptic Malignant Syndrome]
Baclofen
MOA
_________________
Indication
Inhibits [spinal cord GABAB R] → sk muscle relaxer
_________________
[Muscle spasm(ie acute low back pain)]
muscle relaxer
Cyclobenzaprine
MOA (2)
_________________
Indication
[(TCA-cousin✏️) with anticholinergic effect] + [centrally acting sk muscle relaxer]
_________________
[Muscle spasm(ie acute low back pain)]
muscle relaxer
📝Cyclobenzaprine is structurally similar to (and has similar anticholinergic effect) as TCA
(-triptans)
MOA (4)
.
⭐[5HT(1B/1D)🟢] →
🔧Inhibits trigeminal n activation
🔧inhibits vasoactive peptide release
🔧induces vasoconstriction
TOX: [Coronary Vasospasm (CTD in CAD/Prinzmetal angina)], paresthesia