What is a Patient Information Leaflet and why is it useful?

The Patient Information Leaflet (PIL) is the leaflet included in the pack with a medicine. It is written for patients and gives information about taking or using a medicine. It is possible that the leaflet in your medicine pack may differ from this version because it may have been updated since your medicine was packaged.

Below is a text only representation of the Patient Information Leaflet. The original can be viewed in PDF format using the link above.

Cyanocobalamin Tablets 50mcg

Patient Information Leaflet

Cytacon® 50micrograms Tablets

Cyanocobalamin (Vitamin B12)

Read all of this leaflet carefully because it contains important information for you. This medicine is available without prescription. However, you still need to take Cytacon Tablets carefully to get the best results from it. Keep this leaflet. You may need to read it again. Ask your pharmacist if you need more information or advice. If any of the side effects become serious, or if you notice any side effects not listed in this leaflet, please tell your doctor or pharmacist.

The name of your medicine is Cytacon 50micrograms Tablets. It will be referred to as Cytacon Tablets for ease of use hereafter.

What is in this leaflet:

1. What Cytacon Tablets are and what they are used for
2. What you need to know before you take Cytacon Tablets
3. How to take Cytacon Tablets
4. Possible side effects
5. How to store Cytacon Tablets
6. Contents of the pack and other information

1. What Cytacon Tablets are and what they are used for

Cytacon Tablets contain cyanocobalamin,which is known as vitamin B12. Most people get enough vitamin B12 from their food, but if you have had stomach surgery, or certain diseases of the intestines, or a restricted diet, you may not absorb enough vitamin B12.

Lack of vitamin B12 in the body causes a disease called pernicious anaemia (reduction in the number of red blood cells) which is often treated with vitamin B12 injections.

Cytacon tablets are used to treat vitamin B12 deficiency when injections cannot be used.

2. What you need to know before you take Cytacon Tablets

DO NOT take Cytacon Tablets if:

  • You know that you are allergic to cyanocobalamin or any of the other ingredients of Cytacon Tablets (see section 6 of this leaflet).

Those who have an allergic reaction to Cyanocobalamin by injection are often able to take Cytacon Tablets without problems.

Take special care with Cytacon Tablets if:

If you have any other medical conditions, speak to your doctor before you take these tablets.

Your doctor will want to monitor your response to this medicine carefully, particularly if you are young or elderly. This will probably involve regular examination of your blood every three months for 18 months and then annually.

Other medicines and Cytacon Tablets

Tell your doctor or pharmacist if you are taking or have recently taken or might take any other medicines, including medicines obtained without a prescription. The absorption of Cytacon tablets may be affected by:

  • Neomycin and chloramphenicol which are antibiotics
  • Colchicine, a treatment for gout
  • Biguanides, e.g. metformin, which are used to treat diabetes
  • Cholestyramine which is used to reduce the amount of cholesterol (fats) in the blood
  • Potassium chloride which is used to correct potassium deficiency
  • Methyldopa which is used to treat high blood pressure
  • Cimetidine which is used to treat excess acid in the stomach causing indigestion or ulcer
  • Oral contraceptives

Antibiotics (used to treat infections) and antimetabolites (used to treat some cancers) can affect the blood tests to measure vitamin B12.

Cytacon Tablets with food and drink

Cytacon Tablets should be swallowed with water and taken between meals.

Pregnancy and breast feeding

Ask your doctor or pharmacist for advice before taking any medicine. You should let your doctor know if you are or think you may be pregnant or are planning to become pregnant, or are breastfeeding.

As with all drugs Cytacon Tablets should only be given in pregnancy and when breast feeding if absolutely necessary.

Important information about some of the ingredients of Cytacon Tablets

This medicine also contains lactose (which is a sugar). If you have been told by your doctor that you are intolerant of lactose, contact your doctor before taking this medicine.

3. How to take Cytacon Tablets

Always take Cytacon Tablets exactly as your doctor or pharmacist has told you. You should check with your doctor or pharmacist if you are not sure.

Please read the label carefully, it will tell you how many Cytacon Tablets to take each day.


Adults and Elderly: one to three tablets daily.

Children: one tablet daily.

Cytacon Tablets should be swallowed with water and taken between meals. Do not stop taking this medicine, except on your doctor’s advice. Your doctor may change the dose, depending on how you react to it.

If you take more Cytacon Tablets than you should:

If you accidentally take too much of this medicine, bring any remaining tablets and this leaflet with you to your doctor or pharmacist so that they know exactly what you have taken.

If you forget to take your Cytacon Tablets:

If you miss a dose, take it as soon as you remember, if it is within a few hours of the normal time. Otherwise, leave out that dose completely and take your next dose at the normal time it is due.

Do not take double the amount of Cytacon Tablets if you miss a dose.

4. Possible side effects

Like all medicines, Cytacon Tablets can sometimes cause side effects, although they are rare and not everyone will get these.

Allergic reactions to these tablets are rare but may show as an itchy rash. Very rarely, a severe allergic reaction may occur causing sudden onset of swelling of the face and neck, and shortness of breath.

Acne-like and blister rashes have been reported rarely.

If any of the side effects become serious, or if you notice any side effects not listed in this leaflet, please tell your doctor or pharmacist.

5. How to store Cytacon Tablets

Keep this medicine out of the sight and reach of children.

Do not use Cytacon Tablets after the expiry date which is stated on label. The expiry date refers to the last day of that month. If your medicine is out of date, take it to your pharmacist who will get rid of it safely.

Do not store above 25°C (room temperature). Store in the original container/package. Protect from light.

6. Contents of the pack and other Information

What Cytacon tablets contains

The active substance is cyanocobalamin. Each film coated tablet contains 50 micrograms cyanocobalamin.

Cytacon Tablets also contains lactose, maize starch, magnesium stearate and purified water. The film coating includes hydroxypropyl methylcellulose, ethylcellulose, acetylated monoglyceride, speed colour white 27120 anstead HSE, isopropyl alcohol and dichloromethane.

What Cytacon Tablets look like and contents of pack

The tablets are engraved ‘Cytacon’ on one face and plain on the reverse.

Cytacon Tablets are available in container packs of 50 and 100 tablets and blister packs of 28, 56 and 112 tablets (Not all pack sizes may be marketed).

Marketing authorisation holder

Mercury Pharma Group Ltd.
Capital House
85 King William Street


Recipharm Limited Vale of Bardsley
Ashton under-Lyne
United Kingdom

This leaflet was last revised in December 2013. 100009/LF/3