How effective is COCP
more than 99% effective with perfect use, but less effective with typical use (91%)
3 ways COCP prevents pregnancy
Preventing ovulation (this is the primary mechanism of action)
Progesterone thickens the cervical mucus
Progesterone inhibits proliferation of the endometrium, reducing the chance of successful implantation
2 types of COCP
Monophasic pills contain the same amount of hormone in each pill
Multiphasic pills contain varying amounts of hormone to match the normal cyclical hormonal changes more closely
First line COCP
a pill with levonorgestrel or norethisterone first line
(e.g. Microgynon or Leostrin).
These choices have a lower risk of venous thromboembolism.
first line COCP for pre menstryual syndrome
anything containing drospirenone eg yasmin
3 regimes to take COCP
21 days on and 7 days off
63 days on (three packs) and 7 days off (“tricycling“)
Continuous use without a pill-free period
SE of COCP
Unscheduled bleeding is common in the first three months and should then settle with time
Breast pain and tenderness
Mood changes and depression
Headaches
Hypertension
Venous thromboembolism (the risk is much lower for the pill than pregnancy)
Small increased risk of breast and cervical cancer, returning to normal ten years after stopping
Small increased risk of myocardial infarction and stroke
Best time to start COCP
first day of cycle ie first day of period
no additional conytraception required if started in first 5 days
what to do if u start COCP after day 5 of cycle
requires extra contraception (i.e. condoms) for the first 7 days of consistent pill use before they are protected from pregnancy
what to do when switching between COCPs
When switching between COCPs, finish one pack, then immediately start the new pill pack without the pill-free period.
what to do when switching from POP to COCP
can switch at any time but 7 days of extra contraception (i.e. condoms) is required.
What to do if u miss one dose of COCP
Take the missed pill as soon as possible (even if this means taking two pills on the same day)
No extra protection is required provided other pills before and after are taken correctly
What to do if u miss 2 pills of COCP IF DAYS 1-7
Take the most recent missed pill as soon as possible (even if this means taking two pills on the same day)
Additional contraception (i.e. condoms) is needed until they have taken the pill regularly for 7 days straight
If day 1 – 7 of the packet they need emergency contraception if they have had unprotected sex
What to do if u miss 2 pills of COCP IF DAYS 8-14
no emergency contraception is required
What to do if u miss 2 pills of COCP IF DAYS 15-28
no emergency contraception is needed. They should go back-to-back with their next pack of pills and skip the pill-free period.
when should u stop COCP if ur having major surgery
4 weeks before