Test 3 Drugs Flashcards
Somatropin indication
Hypotituitarism (dwarfism)
Somatropin MOA
synthetic GH
has a role in bone, skeletal muscle, and organ growth.
Increases RBC mass, water transport, and electrolyte transport
Somatropin AE
- fluid retention/edema
- muscle and joint pain
Somatropin PT Specific Considerations
- drug accuracy is difficult
- altered hormone levels exceeding normal ranges
- report abnormal ailments to endocrinologist
- Low GH = low BMD = fracture risk
What is DDAVP?
synthetic ADH (Vasopressin)
Desmopressin (DDAVP) indication?
- hypopituitarism
- nocturia
Desmopressin (DDAVP) MOA
decreases water exceretion, increasing urine concentration
Desmopressin (DDAVP) AE
- dry mouth
- hyponatremia
Drug class for spironolactone
Diuretic (K+ sparring)
Spironolactone indication
- Hyperaldosteronism (mineralocorticoid excess)
- HTN
Spironolactone MOA
nonselective for aldosterone receptors
Spironolactone AE
- hyperkalemia
- lethargy
- mental confusion
- produces gynecomastia in males
- irregualrity in females
Spironolactone notes
used in testosterone blockade for gender transition (male to female)
Eplerenone drug class
Diuretic
Eplerenone Indication
Hyperaldosteronism (mineralocorticoid excess)
Eplerenone MOA
aldosterone receptor blocker
Eplerenone AE
- hyperkalemia
- lethargy
- mental confusion
- produces gynecomastia in males
- irregualrity in females
Eplerenone Notes
more selective than spironolactone
more sought out
more expensive
Drug Classes that treat Muscle Spasticity
- Alpha 2 adrenergic agonist
- centrally acting antispasmodics
- DAA
Muscle spasticity drugs
- Tizanidine (Zanaflex)
- cyclobenzaprine (Flexeril)
- baclofen
Alpha 2 adrenergic agonist drug that treats muscle spasticity
tizanidine (Zanaflex)
Centrally acting antispasmodic drug that treats muscle spasticity
cyclobenzaprine (Flexeril)
DDA drug that treats muscle spasticity
baclofen
tizanidine (Zanaglex) MOA
selectively binds to alpha 2 receptors in CNS to decrease release of excitatory NT from presynaptic terminals and decrease excitability of postsynaptic neurons
tizanidine (Zanaflex) AE
- dizziness
- drowsiness
- asthenia
- hypotension up to 33% within 1 hr,
- peaks 2-3 hrs after doses
tizanidine (Zanaflex) PK/PD considerations
sedation: within 30 minutes of dose
peak 1.5 hours after dose
may take with or w/o food but be consistent due to variable absorption
cyclobenzaprine (Flexeril) MOA
unknown
may inhibit polysnaptic reflex in SC
also possible GABA and serotonin effects, varies by drug
cyclobenzaprine (Flexeril) AE
- sedation
- dizziness
Notes on cyclobenzaprine (Flexeril)
- Beer’s list
- increased risk of fractures
- some anticholinergic effects
- may have limited efficacy at tolerable doses
baclofen MOA
inhibitory effects on alpha motor neuron through inhibition of excitatory neurons (blocks Ca2+ influx into presynaptic terminal = decreases NT release)
baclofen AE
- CNS depressant
- sedation, ataxia, cardiac/resp depression
- Muscle weakness
- In older adults and TBI -> impaired memory and cognition
- transient drowsiness usually disappears within a few days
baclofen PK/PD considerations
increased drug effectiveness with smaller doses
usually intrathecal method
baclofen PT specific considerations
DO NOT abruptly stop meds = can lead to:
- high fever
- AMS
- exaggerated rebound spasiticity and muscle rigidity
- rhabdomyolysis
- system failure
Testosterone Indication
Androgen deficiency
Testosterone administration route
- Topical
- subcutaneous
- patch
- gel
- nasal spray
- buccal
- NO PO option = hepatotoxicity
Testosterone AE
- increase risk of MI, stroke, CV death
- Prolonged use
- hepatic toxicitiy
- hepatitis
- jaundice
- IM
- hepatic adeomas
- infertility with large doses
Testosteron PK/PD considerations
IM –> large swings from trough to peak = variable symptoms relief and mood changes
Testosterone PT specific considerations
- avoid contact with path/gel areas
- monitor BP
B3 adrenergic agonist drug
Mirabegron (Myrebetriq)
mirabegron (Myrbetriq) indication
Men’s BPH (begnin prostatic hypertrophy)
mirabegron (Myrbetriq) MOA
relaxes detrusor muscle = decreases voiding symptoms
mirabegron (Myrbetriq) AE
increases BP
oxybutynin drug class
anticholinergic
oxybutynin indication
Men’s BPH (benign prostatic hypertrophy)
oxybutynin MOA
antispasmodic effect on smooth musce = blocks acetylcholine on smooth muscle
oxybutynin AEs
ABCDs
levothyroxine (Synthroid) indication
hypothyroidism
levothyroxine MOA
synthetic thyroxine (T4), converted to T3, has usual effects
levothyroxine AE
well tolerated unless overtreated
- sweating
- heat sensitivity
- tachycardia
- dirrhea
- nervousness
- menstrual irregularities
- increase BMR
levothyroxine PK/PD considerations
- take on empty stomach
- take 30-60 mins before meal or 3-4 hours after
- do not take with Ca, Mg, Fe, and Al products
levothyroxine PT specific considerations
- requires monitoring/close adjustments
- monitor for cardiac symptoms
levothyroxine Notes
highest risk: baseline CAD, HF
methimazole indication
hyperthyroidism
methimazole MOA
used a monotherapy for 1st year to induce remission
blocks formation of T3, T4 by inhibiting oxidation of iodine
methimazole AE
Common
- rash
- GI upset
- arthralgia (can develop into polyarthritis)
Rare AE
- agranulocytosis
- hepatotoxicitiy
- can cause hypothyroidism
methimazole PT specific considerations
refer if pt develops fever, sore throat, mouth ulcers (possible agranulocytosis)
*hepatotoxicity: increased risk with PTU
methimazole NOTES
can cause birth defects in 1st trimester of pregnancy