Levonelle

Question 1

Indication

Answer 1

Within 3 days of unprotected sex

Question 2

Mechanism

Answer 2

Single dose 1.5mg levonorgestrel

Presumed action: prevents ovulation / disrupts implantation

Question 3

Effectiveness

Answer 3

95% if < 24 hours
85% if 24-48 hours
58% if 48-72 hours

Question 4

CI

Answer 4

Pregnancy
Porphyria
May be less effective if on enzyme inducing medication

Question 5

Side effects

Answer 5

PV bleeding (immediately, at menses or later)
Nausea / vomiting
Headache
Breast / pelvic pain

Question 6

Extra information

Answer 6

If vomit within 3 hours, repeat dose with 10mg domperidone or use IUD instead
Abstain until PV bleeding or after taken COCP for 7 days or POP for 2 days
Ideally abstain for 14 days
If > 7 days late / light bleeding / concerned do pregnancy test 3 weeks post pill