GU pharm lectures Flashcards
what are the two supplements used during pregnancy?
- folic acid
2. B6 pyridoxine
what is the anti nausea drug used in pregnancy?
pyridoxine plus doxylamine
what are the two anti hypertensive drugs that are used in pregnancy?
methyldopa
labetalol
what are the three tocolytics used in pregnancy?
- magnesium sulfate
- nifedipine
- terbutaline
what is considered normal BP in pregnancy?
SBP: less than 140
DBP: less than 90
what is considered mild HTN in pregnancy?
SBP: 140-160
DBP: 90-100
what is considered moderate HTN in pregnancy?
SBP: 160-180
DBP: 100-110
what is considered severe HTN in pregnancy?
SBP: greater than 180
DBP: greater than 110
what are the qualifications for chronic/preexisting HTN?
before 20 weeks or pre PG
greater than 140/90
what is the goal BP in chronic/preexisting HTN?
SBP: less than 140-160
DBP: 90-100
what 4 antihypertensive drugs should you not use in pregnancy? why?
- ACE
- ARB
- direct renin inhibitor
- atenolol
Don’t use these because fetal tissue has angiotensive II receptors
what are the HTN classifications for preclampsia?
SBP: greater than 140
DBP: greater than 90
AND
proteinuria greater than 0.3 in 24 hour urine
what are the HTN classifications for gestational HTN?
SBP: greater 140
DBP: greater than 90
and
NO Proteinuria
AFTER 20th week gestation
what are the HTN classifications for postartum HTN? for how long?
SBP: greater than 140
DBP: greater than 90
exists beyond 12 weeks
AND
PROTEINURIA greater than 0.3 gm
can persist up to 6 months post partum and reverts
how much folic acid does a woman need? and how much do they typically get from baked goods?
a woman needs: 400 mcg/day
a woman gets: 200 mcg day from baked goods.
what is the purpose of supplementing folic acid to a pregnant woman?
prevents neural tube defects
what can folic acid obscure?
vitamin B12 deficiency
what can folic acid interfere with? what are these used for? 2
decrease the effects of pheytoin and phenobarbitol that are used for seizure control
what must you rule out before giving folate supplement to pregnant lady?
B12 deficiency
topical azoles do what?
weaken latex condoms/diaphrams so keep this in mind!!!
what are the four classifications for HTN in pregant woman?
chronic/preexcisting HTN
preeclamptic
gestational
postpartum HTN (preeclamtic HTN that exists 12 weeks post partum)
what is the organ BP for pregant woman?
SBP: less 140-160
DBP: 90-100
how do you tx postpartum HTN?
the same as you would in a non-pregnant woman!
what antihypertensive med do you use to treat preeclampsia and gestational HTN?
labetalol
what antihypertensive meds do you use in postpartum HTN?
labetalol
what antihypertensive do you use in chronic or preexisting HTN?
labetalol
methyldopa
what is the drug class of methyldopa?
cental alpha-adrenergic inhibitor
what is the drug class for labetalol?
b1, b2 and alpha 1 blocker
what is a contraindiction for labetalol?
bronchial asthma
what is the ration of alpha to beta receptor blockade when given orally or IV for labetalol?
1: 3 orally
1: 7 IV
this means stronger when given IV
what does the drug class tocolytics mean?
mean they slow down labor
what are the new reccomendations for medication saftey rating for pregnancy?
- fetal risk summary
- clinical considerations
- data
what are 4 other medications you need to avoid in pregnancy because they can cause harm to the fetus?
- opoids-codeine, hydrocodone, oxycodone
- antipsychotics-can cause withdrawals in neonate
- antidepressants-paxil D, other SSRIs C
- antiseizure medications- C
what are the two hormones that are considered for contraceptive methods?
estrogen and progestin
what are the two estrogen options used for contraception use? why might his only really be considered one?
- ethinyl estradiol
- metstranol (prodrug that is converted to ethinyl estradiol so really, it appears like there is only 1 estrogen option which is ethinyl estradiol)
how many generations of estrogen based contraceptives are there? what is considered low dose estrogen?
there are 3 generations
low dose is considered an estrogen content less than 30 mcg
what is the risk you run when using a low dose estrogen?
increased risk of failure and obesity
higher efficacy results outside of US
how many generations of progestins are there? what happens to their affinity for progesterone receptors and androgenic effect as the generations increase?
4 generations of progestins
as you go through the generations the affinity for progesterone receptors increase and androgenic activity decreases
what are 6 additional benefits of combined oral contraception (COC) in addition to contraception?
- reduced risk of endometrial cancer
- reduced risk of ovarian cancer
- regulation of menstration, reduced dysmenorrhea
- fewer breast fibroadenomas, cysts
- reduced risk of PID
- improved acne control
who are progestin only OC useful in? who would you consider using these in? (8)
use when they can’t take COC
- tobacco
- obesity
- age >35
- HTN with vascular disease
- lupus
- migraine with focal aura
- VTE
- coronary or cerebral vascular disease (stroke)
what are 7 ABSOLUTE contraindications for COC?
- DVT/PE
- CVS/CAD
- breast cancer
- more than 15 cigs a day and older than 35
- hepatic tumor
- active liver disease
- migraine with aura
what are 6 RELATIVE contraindications for COC?
- any smoking
- migraine disorder
- HTN
- fibroid tumors of uterus
- breast feeding
- diabetes
what are 4 common SE of COC?
- N/V
- headaches
- weight gain
- breakthrough bleeding 30-50% women
when does breakthrough bleeding when using a COC usually resolve?
3-4th menstrual cycle
depending on when breakthrough bleeding occurs during menses when using a COC can tell you wnat you need to do to fix it…what do you do in these situations:
- bleeding late in active pills?
- prolonged menses?
- midcycle bleeding?
- bleeding late in cycle: increase progestin
- prolonged menses: increase estrogen dose
- midcycle bleeding: increase estrogen AND progestin dosing
if a COC caused a headache…what should you do? when?
if they get blurred viision or neuro deficit or increased frequency of migraine, STOP COC and workup!!!
what can progestin in COC cause?
decreased libido, depression, dyslipidemia, bloating, constipation
what can estrogen in COC cause? (2)
mastalgia
weight gain
when do GI SE of COC resolve?
bloating, constipation, and N/V usually resolve within 1-3 months of use
what are four side effects of estrogen excess?
- bloading
- migraine headache
- decrease libido
- weight gain
what are the 3 SE of estrogen deficiency?
spotting
amennorhea
vaginal dryness
what are the 4 SE of progestin excess?
- acne
- increased appetitie
- fatigue
- dperession
what is the SE of progestin deficiency?
amenorrhea
is estrogen a CYP34A substrate? what are five things can make this less effective?
YES!!!
- anticonvulsants
- corticosteroids
- penicillins
- st. johns wart
- rifampin
what is one really important benefit of progestin only OC?
less risk of thromboembolytic event
what are the two options for progesterone?
- norethindrone
2. norgestrel
what is one down side of progestin OC?
it must be taken at the same time each day to maintain adequate levels of the drug in patient system
what are the prototype drugs for each of the COC drugs?
monophasic: loestrin FE 1/20
norethiadone acetate, ethinyl estradiol
biphasic: lo lostrin FE 1/10
norethiadone acetate, ethinyl estradiol
triphasic: triphasil
levonorgestrel/ethinyl estradiol
quadraphasic: natazia
dionogest/estradiol valerate
what is important to do with both the triphasic and quadriphasic COC?
make sure you take it at the same time each day to avoid breakthrough bleeding
what is the progestin only called? what does it do less of when compared with OCP?
ovrette
containing norgestrel
inhibits ovulations less than COC
are progestin only BC and COC the same efficacy?
progestin only OCP has about the same effiiacy as COC with 20 to 30 mcg of EE
what can progestin only BC cause in a woman who has been taking it long term?
can cause breakthrough bleeding and amenorrhea
who are extended cycle OC helpful for?
women who have menstrual related sxs like HA, menorrhagia, anemia, endometriosis related pain
what is the name of the extended cycle OC that has a constant amount of leveonorgestrel/EE?
Lybrel
what is normal during the first few months of taking an extended cycle OC?
breakthrough bleeding in the first few months since the EE content is low