Mens Health Therapeutics Flashcards
Alfuzosin
Alpha blocker 2nd gen
Least potential for hypotension, dizziness, less ejaculatory dysfunction than tamsulosin
BPH
Prostate normally secretes alkaline fluid during ejaculation
Prostrate presses on bladder neck and excessive alpha adrenergic tone
Incomplete bladder emptying
Common, urinary discomfort
Asians lower risk
Obesity, cirrhosis
Prevention: daily NSAIDs 50%
Stromal tissue and capsule have alpha1 receptors: contraction
Tx: 1) tamsulosin, terazosin,
2) finasteride, dutasteride,
Digital rectal exam age 45
Clinical, phys, anatom, biochem (PSA)
Dried cranberries for LUTS
Tamsulosin
3rd generation selective alpha 1 blocker
No effect on blood pressure
Take with meals
AE: abnormal ejaculation, dizziness
Cimetidine DDI decreased clearance
Sildosin
~tamsulosin
Contraindicated in severe renal impairment (<30)
AE: retrograde ejaculation
5a-reductive inhibitors
DHT stimulates prostatic growth
Reduce DHT production, prostate size
Increase flow rate, improve voiding symptoms
More sexual side effects
Benefits in 6 months
Finasteride type 2 5a specific
Prostate tumor
PSA increases despite normal decrease in PSA with dutasteride
Erectile dysfunction
Men > 40
Cardio disease, atherosclerosis, HTN
Organic and psychogenic
Hormonal: hypogonadism, low T, elevated prolactin, low LH
Smoking, alcohol, CNS depressant
Erection
Vascular, CNS, hormonal, psychogenic
Arterial flow > venous flow out
Blood fills sinusoids
ACh produces vasodilation by NO
Increase cGMP / ACyclase
Visual stimuli and dopamine
Priapism
Prolonged erection
Meds that can cause ED
Anticholinergic Dop agonist: metoclopramide Estrogen, antiandrogens:ketoconazole CNS depressant: BZD, opioid, barb SSRI (can use bupropion for depression)
Decrease penile blood flow: diuretic, beta blocker
ED treatment
Weight loss
1) PDE5 inhibitors: decrease cGMP metabolism, selective for genital tissue
AVOID w/ nitrates!
Sildenafil on empty stomach
Take at least 5 doses before failure
Tadalafil long acting can be taken daily
Vardenafil fastest onset 16 min
AE: decrease BP, priapism
PDE5 inhibitor adverse effects
Sildenafil AE: abnormal vision
Tadalafil AE: nasal congestion
PDE5 inhibitors increased by
Nitrates Alpha blockers Azole 3A4 inhibitor Protease inhibitor Erythromycin
PDE5 inhibitors decreased by
3A4 inducers
Phenytoin
Rifampin
Carbamazepine
Moderate risk CVD
PDE5
NYHA class 2
Do cardiac workout to see if PDE5 inhibitor is appropriate