Contraception Flashcards
What are the 3 main types of emergency contraception?
Levonorgesterol
Ulipristal
Copper IUD
When does each type of emergency contraception work?
Levonorgesterol- <72 hrs
Ulipristal- <120 hrs
Copper IUD- <120 hrs
What are the brand names for the emergency contraceptions?
Levonelle (£25)
ellaOne (£25)
Copper IUD (GP)
How effective is levonorgesterol?
95% effective in <24 hours, 84% effective <72 hours
What is the MoA of levonorgesterol?
stops ovulation and inhibits implantation
What is the dose of levonorgesterol?
1.5mg STAT [n.b. double dose if >26 BMI or >70kg]
How well tolerated is levonorgesterol?
o Safe, well-tolerated (potential slight menstrual cycle disturbance)
o If vomiting within 2 hours of dose, repeat the dosage
o Can be used >1 in each menstrual cycle
How effective is Ulipristal acetate?
95% effective in <120 hours (5 days)
What is the MoA of Ulipristal acetate?
selective progesterone receptor modulator -> inhibits ovulation
What is the dose of Ulipristal acetate?
30mg STAT
How well tolerated is Ulipristal acetate?
Not to be used: alongside levonorgesterol, severe asthma
o If normally on hormonal contraception, they should restart 5 days after ulipristal (use barrier for 5 days)
o If vomiting within 3 hours of dose, repeat the dosage
o Unsure if safe if used >1 in each menstrual cycle
How do you deal with emergency contraception in overweight people?
o BMI >26 or >70kg:
§ 1st line: Ulipristal acetate 30mg STAT (ellaOne); continue oral contraception after 5 days
§ 2nd line: Levonorgesterol (Levonelle) double dose (3mg / 3000ug) + barrier contraception
How effective is copper IUD?
99% effective in <120 hours
What are the indications of copper IUD?
§ <5 days of last UPSI; OR
§ Up to 5 days after the likely ovulation dat
What is the MoA of copper IUD?
spermicide and prevents implantation
Prophylactic antibiotics if at high risk of STI
Can copper IUD be used long term?
yes
What other advice do you give for emergency contraception?
· Cost of morning after pill: £25 (can be free from GUM clinic and GP walk in centre)
· ADVICE: offer STI screen and recommend taking a pregnancy test if her next period is late
· Side-Effects of Emergency Contraception (NOT IUD): N&V, headache, breast tenderness, abnormal menstrual bleedin
What is the pearl index?
describes the chance of becoming pregnant on contraception:
o Pearl index = the number of pregnancies occurring per 100 woman-years
o I.E. Pearl of 2 = 2 pregnancies per year in 100 women
§ This is a bad contraception… an index of 0.2 is more likely
What is the time to effect for long term contraception?
- Instant: Copper Coil
- 2 days: POP
- 7 days: COCP, IUS, injection, implant
What is barrier method?
Condom
What are the daily methods of contraception?
Combined oral contraceptive pill (COCP)
Transdermal Patch (weekly)
Progesterone only pill (POP)
Vaginal ring (3-weekly)
What is the hormone in the COCP (microgynon 30)?
OESTROGEN (ethinyl oestradiol) and PROGESTERONE (progestin
How does COCP work?
Prevents ovulation
How do you take COCP?
- OD for 3 weeks -> 1 week off (withdrawal bleed); OR
- Tricycle: OD for 9 weeks -> 1 week off (withdrawal bleed)
If started on the first 5 days of the cycle (28-day cycle) -> confers immediate contraceptive protection If starting at any other time, use additional measures for the first 7 days