Live Chat 020 3322 2225
Patient Support Team available now: Mon-Fri 08:00-18:00
  • Private & confidential serviceDiscreet packaging and payment
  • Genuine & branded medicationFrom our UK registered pharmacy
  • All inclusive service - No hidden feesAll prices include shipping & prescription
  • Next day UK deliverySame day delivery in London
Manufactured by Merck Sharp & Dohme (MSD)


Buy the Mercilon contraceptive pill online in the UK without a doctor's appointment

  • Mercilon
  • Mercilon
  • Mercilon
  • Mercilon
  • Mercilon
  • Mercilon
  5 / 5
2 patient review(s) on
We are verified by:
McAfee SECURE site

Mercilon is a highly effective oral contraceptive that is taken over 21 days of your 28-day cycle and has been proven to be 99% effective at preventing pregnancy. This contraception is a combined pill containing both synthetic oestrogen and progestogen and can be used to help alleviate menstrual cycle symptoms such as cramping and a heavy flow.

Buying Mercilon online is a popular method amongst women as it doesn't require booking and attending a doctor's appointment in person. You can order either a three month or six month supply meaning you only need to buy your contraceptive between two to four times a year.

Package Size
  • All inclusive serviceNo hidden fees
  • Next day deliveryDiscreetly packaged
  • Prescription includedOur doctors assess you online
Order before midnight for dispatch tomorrow

How to buy Mercilon online?

Mercilon is highly effective when taken correctly, and well tolerable for a wide range of women. Being a combined pill, it contains both artificial oestrogen and progestogen to manipulate your body into thinking ovulation has already happened. This process makes Mercilon 99% effective at preventing pregnancy, as well as including a whole host of other benefits.

Buying Mercilon online in the UK is a simple process, and available in either 63 tablets or 126 tablets from OnlineClinic. Being a clinically proven medication, you will require a prescription slip before purchasing, which can be obtained after a quick consultation. Buying contraception online avoids booking and attending a face-to-face appointment, especially when you know the medication is suitable and you have a busy schedule. In addition, OnlineClinic offer free next day delivery meaning you can get your contraception quicker than the usual traditional format and in time, if you happen to have forgotten, meaning you stay completely protected.

What is Mercilon?

Mercilon is an oral contraceptive that is taken on a daily basis. Its primary aim is to prevent pregnancy, of which it is 99% effective at doing so, however there are benefits including reducing menstrual cramps and a heavy flow as well as making your time of the month far more predictable.

Mercilon is a combined pill meaning it contains both artificial oestrogen and progestogen, although it's worth noting that this particular contraceptive does contain a lower dosage of oestrogen than most pills so can be suitable if you have experienced side effects with the female sex hormone.

Short facts about Mercilon
How to take

Mercilon is taken over 21 days of the month. This is one tablet daily, at the same time, with a seven day break where you will experience a withdrawal bleed similar to a period.

How it works

Mercilon works by not producing an egg the vast majority of the time, thickening the cervical fluid so the sperm cannot penetrate and altering the womb lining so an egg can't attach itself.


Mercilon is 99% effective at preventing pregnancy as well as easing painful menstrual cramps and other period related symptoms.


There is one dosage available to buy online in the UK. This contains 150mcg of ethinyl estradiol and 20mcg of desogestrel.

Side effects

Side effects, especially those that can cause distress, are rare with Mercilon. If you do experience side effects, these tend to pass over a couple of months or are extremely manageable, and include breast tenderness, nausea/vomiting and spotting.

How does Mercilon work?

Mercilon has two active ingredients; synthetic oestrogen ethinyl estradiol and synthetic progestogen desogestrel. These two hormones work in three ways to prevent conception. Firstly, it is extremely unlikely an egg will be released because these hormones trick your body into thinking you have already ovulated. This is the primary function the majority of the time. If by some chance, an egg is released, there is a back up plan.

The hormones also thicken the cervical fluid meaning it's much more difficult for the sperm to reach the egg. Lastly, the womb lining alters an thins meaning an egg cannot attach itself. With three ways to prevent pregnancy, this makes Mercilon 99% effective when taken correctly.

How to take Mercilon?

Mercilon comes in the form of blister packs; tree for three months and six for six months. Each blister pack is clearly marked with the day of the week, making it easier for you to keep track, and contains 21 pills that each have the same amount of hormones in them.

  • Take one pill daily at around the same time
  • Continue for 21 days
  • Then you should have a seven-day break
  • During this time, you will experience a withdrawal bleed similar to a period
  • After seven days, you can continue with the next pack

You should take each pill at around the same time everyday for it to remain highly effective. If you miss or delay taking a pill, you can refer to our combined pill page for more information on what to do.


There is only one dosage of Mercilon that is 150mcg of ethinyl estradiol and 20mcg of desogestrel. This has been proven to be highly effective with a reduced likelihood of side effects and can be ordered online safely.

Side effects and precautions

Side effects of any combined pill, including Mercilon, can occur during the first three months of taking the medication as your body comes accustomed to the hormones. Doctors will always advise that you stick with the pill of choice unless the side effects are completely unmanageable. Some side effects include spotting (bleeding), nausea, mood changes and breast tenderness. If these symptoms persist, contact your doctor for more information or an alternative method.

There might be some precautions to consider before buying Mercilon. This could mean you can still use the contraceptive with caution, or you cannot use at all. These include, if you have, had have or are:

  • Pregnant
  • Breastfeeding
  • Heart problems
  • Stroke
  • Blood clot
  • Deep vein thrombosis
  • Unexplained vaginal bleeding

Mercilon is not an effective method against sexually transmitted infections (STIs). If you are unsure about the sexual health of your partner, or yourself, you should use a condom or get tested before having sex without barrier contraception.

Treatment Information

Treatment Information
Product Name: Mercilon
Active Ingredient(s): Ethinylestradiol and Desogestrel
Manufacturer: Organon
Administration: Oral
Presentation: Tablets
Available Dosage: 0.15 mg, 20 mcg
Exemption: Subject to medical prescription
Application: Offering protection against pregnancy for women over 18
Posology: Take 1 tablet per day for 21 days followed by a 7 day break
Description: Mercilon is a combined contraceptive that offers almost complete protection against pregnancy
Drug class: Combined pill (POM)
Alcohol consumption: No influence
When breastfeeding: Not recommended, ask your doctor for alternatives
When pregnant: Not recommended, ask your doctor for alternatives
Download Mercilon - Patient Information Leaflet
Fill out a short medical form
Doctor issues prescription
Medication sent from pharmacy
Mercilon Alternatives
  • Outstanding
    4.9 / 5

    1,135 patients have rated our service

  • Outstanding   5 / 5

    2 patients have reviewed Mercilon

  • Our patients love
    • Reachable and friendly patient support

      Patient Service online now: Mon-Fri 08:00-18:00
    • All inclusive service - No hidden fees

      All prices include shipping & prescription
    • Next day delivery

      Guaranteed to all orders before 4.30 pm

Current reviews for the treatment Mercilon

Rated with 5/5 based on 2 Independent customer reviews on Feefo (See all OnlineClinic reviews).

  • Outstanding

    Product ReviewGood to receive the same brand that I have used before so that I know they...

    Service Review:Consultation thorough and easy to do

  • Outstanding

    Product ReviewFantastic

    Service Review:Fantastic