ABSTRACT
Reversible and reliable Increased risk of myocardial infarction and venous thrombosis (rare)
12 hour window in which to remember to take the pill
Drug interactions reduce efficacy (e.g. antibiotics, carbamazepine)
Reduces menorrhagia and dysmenorrhoea
Vomiting/diarrhoea reduces effectiveness
Reduces risk of pelvic inflammatory disease, endometrial and ovarian cancers
Can cause side-effects, e.g. nausea, headaches, breast tenderness
May help with acne Medical history may not make everyone suitable (smokers, clots, migraine)
CONTRACEPTIVE INJECTION (Depo-Provera† and Noristerat†)
= Long-acting reversible contraceptive. = Mechanism of action:
= progesterones are slowly released, bypassing the portal circulation; = cervical mucus becomes hostile to sperm and, unlike the POP,
ovulation is usually also prevented. = Failure rate:B0.4 in 100 women over 2 years. = Directions for use:
= Depo-Provera† is administered every 12 weeks by intramuscular injection;
= Noristerat† is administered every 8 weeks.
