Levonorgestrel ECP

Pregnancy & gynaecology-specific. Every dose row is source-referenced; verify against institutional protocols.

Levonorgestrel ECPProgestogen EC

Regimens checked: 2026-10-17. Each indication has its own preparation, limits and safety checks.

Levonorgestrel ECP: indication-specific regimens
Indication	Dose	Route	Frequency	Duration / preparation	Maximum	Monitoring / cautions
After unprotected/inadequately protected intercourse; assess timing and offer the most effective suitable option CDCchecked	1.5 mg	Oral	Once, as soon as possible	Single treatment, ideally ≤72 h; CDC allows emergency pills within 5 days, with reduced LNG effectiveness late in the window · One 1.5 mg tablet (or two 0.75 mg tablets together). If vomiting within 3 h, repeat the dose promptly (CDC) Ulipristal or copper IUD may be more effective later in the 5-day window; do not apply ulipristal’s delayed hormonal-restart rule to LNG.	1.5 mg initial course; enzyme-inducing medicines need a separate EC plan, preferably copper IUD when suitable	Monitor Pregnancy test if no withdrawal bleed/period within 3 weeks; assess pregnancy symptoms or abdominal pain Can start/resume hormonal contraception immediately after LNG, using condoms/abstinence for 7 days Contraindications / cautions No benefit for an established pregnancy; does not protect against STIs or later unprotected intercourse

Pregnancy safety

No effect on established pregnancy

Lactation

Compatible