Synthetic progestin (emergency contraception)
Levonorgestrel with liver impairment: dosing and safety
The liver is the main site of metabolism for many medications including Levonorgestrel (Levonorgestrel). Liver impairment slows clearance and can raise plasma levels of Levonorgestrel above the intended range, amplifying side effects. People with chronic liver disease, recent hepatitis or significantly raised liver enzymes need a tailored approach to Levonorgestrel at 1.5mg.
Why liver function matters
Levonorgestrel undergoes hepatic metabolism through CYP enzymes for many medications. Reduced hepatic function slows this metabolism, prolongs the half-life and raises plasma concentrations. In emergency contraception, levonorgestrel works primarily by delaying or inhibiting ovulation when taken before the LH surge. The prescribing information typically classifies severity by Child-Pugh score (A mild, B moderate, C severe) and gives dose adjustments accordingly.
Practical guidance
According to the prescribing information for Levonorgestrel, baseline liver function tests are recommended before starting Levonorgestrel in any patient with risk factors and periodically during treatment in chronic liver disease. Severe impairment (Child-Pugh C) often contraindicates Levonorgestrel or requires substantial dose reduction; mild impairment usually permits standard 1.5mg with closer monitoring.
Frequently asked questions
Is Levonorgestrel safe with liver problems? ▾
Mild liver impairment typically allows Levonorgestrel at standard or slightly reduced 1.5mg with monitoring. Moderate-to-severe impairment often requires substantial dose reduction. Severe (Child-Pugh C) impairment may contraindicate Levonorgestrel entirely.
Will Levonorgestrel damage my liver? ▾
Most Synthetic progestin (emergency contraception) medications at standard 1.5mg doses do not harm a healthy liver. A small subset can produce drug-induced liver injury in susceptible patients, usually detected by routine ALT/AST monitoring. The prescribing information for Levonorgestrel lists the documented risk.
Products containing Levonorgestrel
More on Levonorgestrel
- With alcoholLevonorgestrel and alcohol — is it safe to drink?
- With foodShould Levonorgestrel be taken with food?
- Side effectsLevonorgestrel side effects: common, rare and warning signs
- Dosage guideLevonorgestrel dosage guide: how much to take and when
- OnsetHow fast does Levonorgestrel start working?
- DurationHow long does Levonorgestrel last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.