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How can I get Mercilon?

All that you have to do to get Mercilon prescribed is complete an online consultation form. This will be reviewed by one of our doctors and a prescription will be issued to our pharmacy that will then dispense your medication for next day delivery.

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Mercilon Product Description

Mercilon is a combined, low dose oral contraceptive medication that contains two types of female sex hormone. One is a form of oestrogen called ethinyl estradiol and the other is a form of progesterone called desogestrel. These active constituents prevent eggs from being released from the ovaries and cause the normal fluid in the cervix to thicken, making it more difficult for sperm to enter the womb.

Mercilon may also make your periods slightly lighter and less painful. It might even help to reduce premenstrual symptoms. Contraceptive pills do not protect against sexually transmitted infections; your partner will still have to use a condom to protect you against HIV, Chlamydia and other STIs.

How to use Mercilon?

Mercilon tablets are provided in strips of 21 pills. You start by taking the pill marked with your starting day of the week. You then simply take the pills in the order indicated by an arrow marked on the strip until you have used up all 21. You should take each tablet at the same time of day. The pills should be swallowed with water. Do not chew them.

The best time to start taking Mercilon is on the first day of your period. You can also start on the first day after your last dose of a previous 21 or 28 day pill. In both cases Mercilon will provide contraceptive protection from the outset. Other ways to start Mercilon are on Day 5 of your period, or on the first day of bleeding if you are currently taking a mini-pill. These two options, require extra contraception (such as condoms) to be used until you have taken the first seven Mercilon tablets.

After 21 days you have a 7 day break when you take no pills. There is no need to take extra contraception during this time as long as you have taken the pills correctly and start the next strip of pills on time. Within a few days of taking the last pill you will have a withdrawal bleed. This may not have stopped before it is time to start the next strip of pills. But it is very important that you start the new strip on time. The package instructions tell you what to do if you forget to take your pill at any time or if you suffer vomiting or diarrhoea, which may stop the pill being absorbed.

Who can use Mercilon?

If you complete a consultation form we can tell you if Mercilon is appropriate for you. We will not be able to prescribe Mercilon while you are pregnant or breastfeeding. In addition Mercilon cannot be used if you have previously suffered cancer of the breast or uterus, if you have unexplained vaginal bleeding, a thickened womb lining or are at risk of heart disease. There are a few other conditions which will prevent us from prescribing Mercilon. The pill may also affect the way in which some other medicines work. We will be able to advise you about this when we see your consultation form.

Mercilon side effects

While taking Mercilon you will need regular health checkups including cervical smear tests. You should also be sure to check your breasts for changes each month. Possible side effects include headache, weight loss or gain, depression, vaginal thrush, stomach problems and rash. In very rare cases the pill may increase the risk of heart attack, stroke blood clots in the legs, liver disease or breast and cervix cancer.

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Reviewed by: Dr Loraine Haslam MBBS, DRCOG, DFSRH, LoC SDI, LoC IUT, MRCGP
GMC registration number: 4524038
Date: 30 October 2023
Next review: 29 October 2025
All UK registered doctors can have their registration checked on
The Medical Register at the GMC website.

Information Leaflet

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