Male Repro 1 Pharm Flashcards
Androgens
Testosterone, Testosterone enanthate (testosterone ester), Methyltestosterone (17a-alkylated androgen)
Drugs to reduce androgen activity
Flutamide (receptor inhibitor), and Finasteride (5 alpha reductase inhibitors)
Gonadotropin-related Drugs
Leuprolide (GnRH agonists), Degarelix (GnRH antagonists), Follicle stimulating hormone, Human menopausal gonadotropin, Luteinizing hormone, Human chorionic gonadotropin
Drugs for erectile dysfunction
Phosphodiesterase-5 inhibitors (sildenafil and tadalafil), Prostaglandin E1 analog (alprostadil)
Testosterone contraindications
pregnant women, women who may become pregnant, male pts with carcinoma of prostate or breast, renal or cardiac disease predisposed to edema
anabolic steroid abuse effects
acne, aggressive behavior, gynecomastia, erythrocytosis, Increased LDL and decreased HDL, reduced testicle size, reduced sperm production
Leuprolide
GnRH receptor agonist. Increases LH and FSH. Continuous = desensitization of GnRH receptors which inhibits LH and FSH. Pulsatile binds to receptors in anterior pituitary and increases secretion of LH and FSH.
Continuous Leuprolide administration
used to supress GnRH production. Prostate CA, central precocious puberty, block endogenous puberty, endometriosis, uterine fibroids
Degarelix
GnRH receptor antagonist. inhibit secretion of LH and FSH. used in advanced prostate cancer
Flutamide
competitive antagonist at androgen receptor. used for prostate cancer
Finasteride
competitive inhibitor of type 2 5 alpha reductase, androgenetic alopecia (male pattern hair loss), benign prostatic hyperplasia
Physio of erection
Nitric oxide activates guanylate cyclase to generate cGMP leading to sequestration of calcium and smooth muscle relaxation. PDE5 (phosphodiesterase type 5) inhibitors act to inhibit PDE5. PDE5 normally turns cGMP to 5-GMP. More cGMP means more relaxation of smooth muscles
Sildenafil and Tadalafil
increase cGMP by inhibiting PDE5. used for ED, can cause headache/flushing/blue tint to vision. with nitroglycerin vasodilation is amplified so watch out
Alprostadil
intracavernosal injection or intraurethral suppository. Prostaglandin E1 analog. causes vasoldilation. when injected in penis allows blood to flow to corpora cavernosa