Short-acting Contraceptives Flashcards
What are the types of combined hormonal contraception?
Pill
Transdermal Patch
Vaginal ring
What hormones do the combined hormonal contraceptives contain?
Ethinyl estradial (synthetic oestrogen) Various progesterones
With the combined oral contraceptive pill, how many need to be missed before follicular activity resumes?
9
What is the mode of action of the combined hormonal contraceptives?
INHIBIT OVULATION
Act on hypothalamic pituitary ovarian axis to suppress synthesis and secretion of FSH and prevent the surge of LH
What are risks associated with combined hormonal contraception?
Venous thrombosis
Arterial thrombosis
Adverse effects on oestrogen sensitive cancers
Migraine with aura - increased risk of ischaemic stroke
What happens if a woman misses two pills?
Take the most recent missed pill
Take the remaining pills at the correct time
Use condoms or abstain until 7 pills have been taken consecutively
What are the cancer risks associated with CHC?
Breast cancer - contraindicated if personal history
Cervical cancer
What are the non-contraceptive benefits of CHC?
Protection against ovarian and endometrial cancers
Acne reduction
Withdrawal bleed usually lighter and less painful than period
What are side effects of CHC?
Unscheduled bleeding
Mood changed
Weight gain
When can CHC be started?
Up to and including day 5 of cycle
After day 5 if reasonable certain not pregnant and uses condoms/ abstains for 7 days
What are the types of progesterone only pill?
Levonorgestrel
Noresthisterone
Etonorgestrel (newer and longer acting)
What is the mode of action of progesterone only pill?
Thicken cervical mucus
What is the contraindication for POP?
Current breast cancer
What drugs might POP interfere with?
Liver enzymge inducers (cytochrome P450)
