Implant

Question 1

What is the mode of action of the implant?

Answer 1

Progestogen release:
Prevents ovulation
Cervical thickening

Thinning of endometrium

Question 2

What is the failure rate of nexplanon?

Answer 2

0.05%

Question 3

What reduces effectiveness of implant

Answer 3

Enzyme inducers

Question 4

When to initiate implant?

Answer 4

Can be put in at any time, but need to make sure patient is not pregnant.
Works immediately if within first 5 days of cycle, otherwise use condom for 7 days.

Can be put in within first 21 days postpartum - otherwise condom for 7 days.
Safe in breastfeeding

Question 5

What reduces effectiveness of implant

Answer 5

Enzyme inducers:
Anti-epileptics
Anti-retrovirals
St John's wort
Some TB medication (rifabutin and rifampicin)

Question 6

Side effects of implant?

Answer 6

Irregular, light or heavy periods in first year.
Amenorrhea is a common side effect.

Headaches
Acne