What is Levonelle 1500?
Levonelle 1500 contains the active ingredient in Levonogestrel, which is a synthetic version of the female hormone progesterone. It is licensed in the UK for use as emergency contraception up to 72 hours after having unprotected sexual intercourse or failure of regular contraception. Another named Levonelle is marketed under outside of the UK is Norlevo.
How does Levonelle 1500 work?
Levonelle 1500 exerts its contraceptive action by interfering with the hormonal balance in the uterine environment. The result of this is a delay or absence of the release of egg from the fallopian tube, this is a process known as ovulation. Levonelle 1500 also acts to prevent the egg from becoming embedded in the womb.
How effective is Levonelle 1500?
Levonelle 1500 is effective as the emergency contraceptive pill if used within 3 days of sexual intercourse. It is important to take Levonelle 1500 as soon as you can after having sexual intercourse as its effectiveness decreases with time, it is:
- 95% effective when taken within 24 hours of sexual intercourse
- 85% effective when taken within 24-48 hours
- 58% effective when taken within 48-72 hours
It is important to understand that no form of emergency contraception is 100% effective and if there is any suspicion of existing pregnancy patients should not use emergency contraception and see their GP instead. After taking Levonelle 1500 patients should get their next menstrual cycle around the normal time expected although there may be difference of 1-2 days. If the next period does not occur 5 days later than expected the patient should see their GP they may be pregnant.
How should I take Levonelle 1500?
Levonelle 1500 should be taken as soon as possible but no longer than 72 hours after sexual intercourse to increase effectiveness. The tablet should be swallowed whole with a glass of water. If vomiting occurs within 3 hours of having the Levonelle 1500 the absorption and therefore effectiveness of this medication may be compromised, therefore another tablet should be taken immediately. Levonelle 1500 may be used at any time during the menstrual cycle unless menstrual bleeding is overdue. After using Levonelle 1500 patients are recommended to use barrier contraception (e.g. condoms) until the next period starts.
