416 Exam 4 ED, HRT Flashcards
MOA of PDE-5 inhibitors
Selective inhibition of phosphodiesterase type 5 isoenzymes
-inhibits catabolism of cGMP
PDE-5 inhibitor agents
Sildenafil (Viagra)
Vardenafil (Levitra, Staxyn)
Tadalafil (Cialis)
Avanafil (Stendra)
PDE-5 inhibitor DDI
Nitrates
Alpha blockers (terazosin, doxazosin)
3A4 inhibitors
PDE-5 inhibitor AE
- HA
- flushing
- congestion
- dyspepsia
- dizziness
- hypotension
- visual effects
- hearing loss
- back/limb pain/myalgia
- priapism
Sildenafil dosing
50mg prn
- onset: 30-60min
- duration: 4hrs
- empty stomach
- PDE-6
Tadalafil Dosing
10mg prn OR
- 5-5mg QD
- onset: 30min-6hr
- duration: 24-36hrs
- PDE-11
MOA of Alprostadil
Stimulates adenyl cyclase which increases cAMP and leads to enhanced blood flow to the corpora cavernosa
Alprostadil dosage forms
Intracevernosal injection (Caverject) Intraurethral insert (MUSE)
AE of intracavernosal Alprostadil
- cavernosal plaques
- penile curvature/pain
- priaprism
- injection site hematoma
AE of intraurethral Alprostadil
- urethral injury/pain
- priaprism
- female vaginal burning/pain
Primary trt for hyperprolactinemia
Dopamine agonist (cabergoline > bromocriptine)
Initial trt for ovulatory dysfunction
Clomiphene
MOA of clomiphene
SERM
- competes w/ estradiol for estrogen receptors at the hypothalamus
- blocks estrogen negative feedback at the hypothalamus
AE of clomiphene
- hot flashes
- mild abdominal or pelvic discomfort
- vaginal dryness, mood swings
- less frequent: dizziness, fatigue, breast tenderness, HA
CI with Clomiphene
- uncontrolled thyroid or adrenal dysfunction
- primary ovarian failure or ovarian cysts
- abnormal uterine bleeding
- hepatic disease
- pregnancy
First line trt for polycystic ovary syndrome (PCOS)
Metformin 1500-2000mg/d
Risks of HRT
- endometrial CA
- CV disease
- venous thromboembolism
- breast CA
- ovarian CA
- gallbladder disease
Endometrial CA
Add progestin for intact uterus