Men's Health II Flashcards
Erectile Dysfunction etiology
-DM
-HTN
-cornary artery disease
-MS, Parkinson’s, stroke
-low testosterone (rare)
Physical causes of ED
-injury
-surgeries
-medicines
-radiation
Drug-induced sexual dysfunction
-antidepressants
-anti-HTN
-estrogens/anti-androgens
-5-a reductase inhibitors
-chemo
lifestyle causes of ED
-alcohol
-tobacco
-obesity
-inadequate sleep/fatigue
-stress
Erection subtypes
-psychogenic
-reflexogenic
-nocturnal
Erection mech
-PSNS
-ACH –> NO
-NO –> cGMP
-cGMP = inc Ca
=RELAXATION
-inc blood flow that squeezes vein shut to prevent draining of blood
Nocturnal penile tumescence
-3-6 erection/night
-influenced by T levels
-controlled by sacral nerves (REM sleep, PSNS, full bladder)
ED treatment
- treat/eliminate known causes
- Oral PDE-5 inhibitors
- Intraurethral or Intracavernous TX
- Possible combo therapy
- Penile Prosthesis
Treatment of underlying cause of ED
-D/C drugs if cause
-testosteone tc if hypogonadism
-counseling if psychogenic
Alternative to Oral PDE-5 inhibitors if contraindicated
-vacuum erection devicce
Oral therapies for ED
-first line for most
-smooth muscle relaxation
-PDE-5 inhibitors
-sexual stimulation required
PDE-5 inhibitor drugs
-Sildenafil (Viagra)
-Tadalafil (Cialis)
PDE-5 inhibitor dosing
-many men may not respond to starting dose
-adjust dose to produce erection that lasts no longer than 1 hour
-adjust dose-renal disease
Sildenafil (VIagra) dosing
-50-100mg
-DI w CYP3A4
-lower dose w a-blocker
-take on empty stomach
Tadalafil (Cialis) dosing
-10mg-20mg
-2.5-5mg if daily
-does NOT inc BP
-ok to take w food
-daily low dose may be more effective