PREVENELLE® Emergency Contraception1

What is PREVENELLE® & what is it used for?

  • PREVENELLE® is an emergency hormonal contraceptive.
  • It is used to prevent pregnancy if taken within 72 hours of unprotected sexual intercourse or if your usual contraceptive method has failed.
  • The tablet contains a female hormone called levonorgestrel.

Hoe does it work?

  • PREVENELLE® is thought to work by stopping your ovaries from releasing an egg and preventing sperm from fertilising any egg you may have already released.
  • PREVENELLE® can only prevent you becoming pregnant if you take it within 72hours of unprotected sex. It does not work if you are already pregnant.
  • If another unprotected intercourse takes place after the use of PREVENELLE® (also if this is during the same menstrual cycle), the tablet will not exert its contraceptive effect and there is again the risk of pregnancy.

How to take PREVENELLE®

Do not take PREVENELLE® if:

  • You are allergic to levonorgestrel or any of the other ingredients of this medicine listed in section 6.
  • You are pregnant or think that you may already be pregnant. This medicine will not work if you are already pregnant. If you are already pregnant, PREVENELLE® cannot terminate pregnancy, it is not an “abortion pill”.

You may already be pregnant if:

  • Your period is more than 5 days late, or you have experienced unusual bleeding when your next period is due
  • You have had unprotected sex more than 72 hours ago, and since your last period

How to take PREVENELLE®:

  • One tablet should be taken, as soon as possible, preferably within 12 hours and no later than 72 hours after unprotected intercourse. The efficacy of Prevenelle® is higher the sooner after the unprotected sex the treatment is taken.
  • After using this emergency hormonal contraceptive, use of a barrier method (condom, diaphragm or cervical cap) is recommended until the next menstrual period starts.
  • Emergency contraception is an occasional method and should not replace a regular contraceptive method.
  • This emergency hormonal contraceptive can be used at any time during your menstrual cycle unless menstrual bleeding is overdue by 5 or more days (when it is possible that you are already pregnant).

To find out more details about taking your pill, please click here to see the Patient Information Leaflet. This contains lots of useful, detailed information all about taking your pill, including possible side effects.

What if I vomit after taking PREVENELLE®

  • If you have been sick within 3 hours of taking PREVENELLE®, take another tablet immediately.
  • You will need to contact your doctor, nurse or pharmacist to obtain another tablet.

Frequently asked questions about PREVENELLE®

What side effects may I experience?

Like all medicines PREVENELLE® may cause side effects, although not everybody gets them. Very common side effects include headache, nausea, pain in the lower abdomen (tummy), irregular bleeding and fatigue (feeling tired). Other commonly reported effects include dizziness, diarrhoea, vomiting, irregular menstruation, delayed menstruation and breast tenderness.

If your bleeding is more than 5 days late or is unusually light or unusually heavy, you should contact your doctor as soon as possible.

What happens if I have a stomach upset?

If you have been sick within 3 hours of taking PREVENELLE®, another tablet should be taken immediately. You will need to contact your doctor, nurse or pharmacist to obtain another tablet.

Are there any medicines I shouldn’t take whilst I am on oral contraceptives?

Some medicines may stop PREVENELLE® from working properly and mean that you need to take extra contraceptive precautions. These include medicines to treat epilepsy, tuberculosis, HIV and fungal infections and ciclosporin (used to suppress the immune system) and the herbal remedy St John’s Wort.

Your doctor, nurse or pharmacist will advise you if you are unsure about taking other medicines in combination with your pill.

Can I take this pill if I have previously had an ectopic pregnancy?

Use of this pill is not recommended if you have previously had an ectopic pregnancy. If you use this pill and experience any symptoms of a possible ectopic pregnancy (strong abdominal pain, bleeding), you should visit your doctor immediately.

Can this pill be used repeatedly / regularly?

Use of an emergency contraceptive pill is not recommended more than once in the same menstrual cycle. However, should this method be used several times during the same menstrual cycle, it may cause irregularities in your bleeding pattern.

What should I do if it doesn’t work?

If you have become pregnant despite taking this medicine, visit your doctor for further advice.


  1. MIMS Ireland (August 2016) Contraception pp.322-325. MPI Media Ltd. Dublin
  2. ELVINA Patient Information Leaflet

Information placed on this digital platform is not intended as a substitute for consultation with your healthcare professional. Please consult your doctor or nurse for further information.

IE-OCS-279 Date of preparation: July 2019

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