Reproductive pharm Flashcards
Overview of topics
- Contraception
-short acting
-long acting - Menopausal hormone therapy (HRT)
-systemic
-vaginal local - Menstrual disorders
-pms and pmdd
-heavy/abn menstrual bleeding
-Endometriosis/adenomyosis
-PCOS - Infertility
- Vaginitis
what is contraception?
-prevents fertilization
1. prevent sperm from reaching ovum
2. prevent implantation of fertilized ovum
types of bc methods
- sterilization
-vasectomy = male
-tubal ligation= female - Barrier methods
-condoms, diaphragms, sponge, cervical cap, gel - Short-acting hormonal
-pill, patch, shot, vaginal ring - Long acting reversible
-IUD, non hormonal IUD, implantable rod
5.Natural rhythm methods
Short-acting reversible contraception
the pill
the mini pill
the patch
the shot
the ring
endogenous hormones
- estrogen: causes endometrial thickening and stabilizes lining
MOA: suppresses FSH release-> stabilizes lining-> controls the cycle - Progesterone: thickens cervical mucus
MOA: blocks LH surge-> thickens cervical mucus (decrease sperm penetration, slows tubal mobility, delays sperm transport)-> causes endometrial thinning/atrophy - FSH: stimulates follicles to mature
- LH: triggers ovulation
Types of bc pills
- Combined oral contraception COC= estrogen + progestin
-estrogens= Ethinyl estradiol (synth) and Estradiol valerate (bioidentical) - Progestin only pills= POP
Bioidentical
“compounds that have exactly the same chem and molecular structure as hormones that are produced in the human body”
it is not: compounded, safer, natural, plant sourced
Progestin
synthetic form of progesterone
MOST IMPORTANT AGENT IN CONTRACEPTION BC SUPPRESSES OVULATION BY PREVENTING LH SURGE
-acts like testosterone - hirusitism, voice changes
by generations:
1st gen= oldest= minimize risk of clots in pts >35 but more andro
-Norethindrone acetate
-ethynodiol diacetate
-lynestrenol
-norethynodrel
2nd gen: less clots more andro
-LEVONORGESTREL= mc prescribe LOWEST RISK OF CLOTS
-di-norgestrel
3rd gen: less andro but HIGHER RISK CLOTS
-norgestimate
-gestodene
-desogestrel
4th gen= newest= decrease androgenic SE in those w/ PCOS, HIGHER RISK OF CLOTS
-Drospirenone
-Cyproterone acetate
Dosing regimen
- Monophasic/multiphasic
-mono= same dose of E+P in each of the 21-24 active pills
-bi or triphasic= varying dose by week= more SE and unscheduled bleeding - Cycle use
-original= 21 active 7 placebo
-new= 24 active 4 placebo - Continuous
-pt has control over when they have withdrawal bleeding = always or for 3 mo stents
-taken too long (over a year)= unscheduled breakthrough bleeding
-helpful for PMDD, endometriosis, hyperandrogenism, dysmenorrhea, perimenopause
examples of mono, multiphasic
Side effects of COC
Estrogen: N/V, breast tenderness, melasma, VTE, increase in migraines
Progestin: fluid retention, acne, anxiety/depression, amenorrhea, breakthrough bleeding, cholestatic jaundice
Pearls for COC
- having breakthrough bleeding? increase estrogen
- heavier bleeding? increase estrogen
- HA? decrease estrogen
- Mood swings? change progestin type
- Nausea? change progestin type or lower estrogen
- Decrease libido? switch ethynyl estradiol to estradiol valerate
Sexual health and COC
SE of COC: decreased libido and vestibulitis
First pass metab-> increases sex hormone binding globulin SHBG-> binds extra androgens w/ higher aff for Testosterone than estrogen but binds both-> less available testosterone= vestibulitis
INFLAMMATION OF VESTIBULE (LABIA TO EDGE OF VAGINAL OPENING) IS THE #1 CAUSE OF PELVIC PAIN/DYSPAREUNIA in premenopausal women-> burning, itchy, pain, pain with sex
Contraind for COC
breast cancer
BREAST FEEDING BC ESTROGEN THRU BREASTMILK
severe cirrhosis
history of dvt/pe
MIGRAINE W/ AURA
DIABETES W/ NEPHROPATHY, RETINOPATHY, NEUROPATHY= COMPLICATED
current gall bladder dz
history of bariatric surg w/ malabsorptive procedures
htn
ischemic heart dz
postpartum w/in 21 days
SMOKING UNDER 35
history of CVA
solid organ transplant
Lupus
complicated valvular heart dz
DONT MEM BUT KNOW WHERE TO GO= CDC
COC drug interactions
Antiretrovirals for PrEP or HIV
Anticonvulsants
-phenytoin, carbamazepine, barbiturates
RIFAMPIN IS THE ONLY ONE W/ DIRECT INTERACTION W/ BC
okay w/ SSRIs
Starting BC
start anytime
- started w/in first 5 days since period= no additional contraception
-started w/in over 5 days since period= abstain or use back up for 7 days
unsure if prego? start COC and do a prego test in 2-4 wks
Missed a dose?
late= <24 hours since last dose
Missed=>24 hours since last dose
-late or one missed= TAKE ASAP AND CONTINUE TAKING REMAINING PILLS = NO BACKUP NEEDED
-two or more missed= take most recent pill and discard the rest and continue pack -> USE BACKUP OR ABSTINENCE FOR 7 days
-missed on days 15-21= omit the placebo period and finish current pack and begin next pack the next day + possible emergency contraception
Progestin only pill aka POP or Mini pill
Indications: breastfeeding, estrogen contrain, worsened migraines, high bp w/ COC
Daily w/ no “free period”-> as effective as COC if taken at same time every day-> higher failure if 3 hours late-> use backup for 7 days
Downside: less effective than COC, not as CONSISTENT inhibitor of ovulation-> higher incidence of Breakthrough bleeding and ectopic pregnancies
SE: HA, depression, weight gain, acne, hirsuitism
POP:
Norethindrone
-Ortho micronor
-Camila
-Errin
-Heather
Short acting hormonal contraception: patches
Patches= Ethinyl estradiol + norelgestromin (Xulane, Zafemy_
rotate sites- abd, back, butt, upper arm-> change weekly for 3 weeks then skip for withdrawal
HIGHER RISK FOR VTE BC HIGH DOSE
not as effective in obesity
Short acting hormonal contraception: vaginal ring
- Monthly ring= Ethinyl estradiol + etonogestrel= NuvaRing or EluRyng-> insert for 3 weeks and remove for bleed
- Annual vag ring= Ethinyl estradiol + segesterone acetate-> 3 wk on and 1 off-> reused for a total of 13 cycles
Short acting hormonal contraception: shot
Depo-Provera IM inj: medroxyprogesterone acetate
MOA: prevents ovulation
Can be given immediately postpartum in females who are breastfeeding
SE: weight gain, mestrual irreg, breast tenderness, depression
Short acting non-hormonal contraception
Phexxi gel- lactic acid, citric acid, potassium bitartrate
insert up to 1 hr prior to intercourse
MOA: maintains vaginal pH 3.5-4.5 so that sperm does not increase pH to 6.5-7.5= acid prevents swimming
86% w/ typical use, 99% w/ perfect use
SE: vaginal discharge, vaginal irritating, kidney/bladder infxn (rare)
Long acting reversible contraception (LARC)
- Hormonal
-IUD
-Implant - Non-hormonal
-Copper IUD