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Salcrozine 500 mg gastro-resistant tablets – patient leaflet, side effects, dosage

Last updated: · Text from the MHRA, as of · About this document

Medicine status: Prescription only (POM) Details

Medicine strength:
500 mg
Other strengths and forms:
Contains active substance:
ATC code:
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Patient leaflet - Salcrozine 500 mg gastro-resistant tablets

1. What Salcrozine is and what it is used for

Salcrozine gastro-resistant tablets contain 500 mg of the active substance mesalazine (also known as 5-aminosalicylic acid), which belongs to a group of drugs called intestinal anti-inflammatory drugs. Salcrozine is indicated in the treatment of ulcerative colitis, an inflammatory bowel disease.

2. What you need to know before you take Salcrozine

Do not take Salcrozine:

  • if you are allergic to mesalazine or any of the other ingredients of this medicine (listed in section 6).
  • if you are allergic to acetylsalicylic acid or any other salicylate.
  • if you have a medical condition that can make you prone to bleeding.
  • if you have severe kidney impairment and/or liver impairment.

Warnings and precautions

Talk to your doctor or pharmacist before you start taking Salcrozine.

Before starting treatment with Salcrozine, tell your doctor:

  • if you are or want to become pregnant
  • if you are nursing your child
  • if you have liver or kidney problems
  • if you suffer from any lung disease, for example, asthma
  • if you have been allergic to sulfasalazine in the past
  • if you have an ulcer in your stomach or bowel intestine
  • if you have previously had inflammation of the heart (which could be a consequence of an infection in the heart)
  • if you have ever developed a severe skin rash or skin peeling, blistering and/or mouth sores after using mesalazine.

If you experience strong or recurrent headache, disturbed vision, or ringing or buzzing in the ears contact your doctor immediately.

In case of any allergic manifestation (e.g. rash, pruritus) or cramps, abdominal pain, severe headache and fever during the course of treatment, do not take more tablets and tell your doctor immediately.

Before and during treatment, your doctor may want to perform blood and urine tests on a regular basis to check the functioning of your liver, kidneys, blood and lungs.

Kidney stones may develop with use of mesalazine. Symptoms may include pain in sides of abdomen and blood in urine. Take care to drink a sufficient amount of liquid during treatment with mesalazine. Serious skin reactions including drug reaction with eosinophilia and systemic symptoms (DRESS), Stevens-Johnson syndrome (SJS), and toxic epidermal necrolysis (TEN) have been reported in association with mesalazine treatment. Stop using mesalazine and seek medical attention immediately if you notice any of the symptoms related to these serious skin reactions described in section 4.

Mesalazine may produce red-brown urine discoloration after contact with sodium hypochlorite bleach in the toilet water. It concerns a chemical reaction between mesalazine and bleach and is harmless. Children and adolescents

The safety information on the use of this medicine in children and adolescents is limited. Do not administer to children under 5 years.

Other medicines and Salcrozine

In general, you can continue treatment with other medicines while taking Salcrozine. However, tell your doctor or pharmacist if you are taking, have recently taken or might have to take any other medicines, including medicines obtained without a prescription.

Salcrozine can interact with some medications if they are given at the same time.

In particular:

  • medicines to lower blood sugar (antidiabetics)
  • medicines to lower blood pressure (antihypertensives/diuretics)
  • medications for the treatment or prevention of gout attacks
  • medicines that help with bowel movements (laxatives containing lactulose)
  • medicines to prevent blood clotting (anticoagulants)
  • medicines to reduce the activity of the immune system (e.g. azathioprine or 6-mercaptopurine or thioguanine)
  • medicines to treat pain and inflammation (anti-inflammatories).

Pregnancy and breast-feeding

If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.

There is limited experience with the use of mesalazine during pregnancy and breast-feeding. The newborn may develop allergic reactions after breast-feeding, e.g. diarrhoea. If the newborn develops diarrhoea, breast-feeding should be discontinued.

Women who are pregnant or breast-feeding should not take Salcrozine unless advised otherwise by their doctor.

Driving and using machines

Salcrozine have no or negligible influence on the ability to drive or use machines.

Salcrozine contains sodium

This medicine contains 2.13 mmol (or 49 mg) of sodium (main component of cooking/table salt) in each gastro-resistant tablet. This is equivalent to 2.5 % of the recommended maximum daily dietary intake of sodium for an adult.

Talk to your doctor or pharmacist if you need 8 gastro-resistant tablets daily for a prolonged period, especially if you have been advised to follow a low salt (sodium) diet.

3. How to take Salcrozine

Always take this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.

Your doctor will tell you the duration of your treatment with this medicine. Do not stop treatment earlier, even if you feel better, because the symptoms may come back if you stop treatment too soon. Follow the treatment strictly according to the instructions of your doctor, both in the acute inflammatory phase and in the maintenance time that you establish.

The recommended dose for adults is:

To treat an acute episode of colitis, your doctor will usually prescribe a dose between 1.5 grams (3 gastro-resistant tablets) and 4 grams (8 gastro-resistant tablets) of mesalazine per day, which can be given once daily or in divided doses.

To help prevent more episodes, your doctor may prescribe a dose between 1.5 grams (3 gastro-resistant tablets) and 3 grams (6 gastro-resistant tablets) of mesalazine per day, which can be given once daily or in divided doses.

Salcrozine gastro-resistant tablets should be taken orally.

The gastro-resistant tablets should be swallowed whole, with liquid and before meals. Do not divide, chew or crush.

Use in children and adolescents

Salcrozine is not recommended to be given to children and adolescents under 18 years of age due to lack of data on safety and efficacy. Do not administer to children under 5 years.

Package leaflet: Information for the patient

Salcrozine 500 mg gastro-resistant tablets

mesalazine

805660 200x594 ENGLISH 805660/VA 805660/VA

12/02/26

13.2 PT

11 PT

Use in elderly

The use of Salcrozine in elderly patients should be done with caution and always limited to those patients with normal renal function.

If you take more Salcrozine than you should

If you take more Salcrozine than you should, contact your doctor, pharmacist or the hospital emergency department immediately. Take the Salcrozine package with you.

If you forget to take Salcrozine

Do not take a double dose to make up for a forgotten dose.

If you stop taking Salcrozine

It is important that you take Salcrozine gastro-resistant tablets every day, even when you do not have symptoms of ulcerative colitis. Always finish the treatment you have been prescribed. If you have any further questions on the use of this medicine, ask your doctor, pharmacist or nurse.

4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

All medicines may cause allergic reactions although serious allergic reactions are very rare. If you get any of these symptoms after using this medicine, stop taking these tablets and contact your doctor immediately:

  • allergic skin rash,
  • fever,
  • difficulty in breathing.

If you experience fever or irritation of the throat or mouth, stop using these tablets and contact your doctor immediately. These symptoms may be due very rarely to a reduction in the number of white cells in the blood (a condition called agranulocytosis).

Serious side effects:

Stop using mesalazine and seek medical attention immediately if you notice any of the following symptoms: -reddish non-elevated, target-like or circular patches on the trunk, often with central blisters, skin peeling, ulcers of mouth, throat, nose, genitals and eyes, widespread rash, fever and enlarged lymph nodes. These serious skin rashes can be preceded by fever and flu-like symptoms.

-if you experience strong or recurrent headache, disturbed vision, or ringing or buzzing in the ears. These could be symptoms of increased pressure within your skull (idiopathic intracranial hypertension). The following side effects have also been reported in patients using mesalazine: Rare (may affect up to 1 in 1,000 people):

  • abdominal pain, diarrhoea, flatulence, nausea and vomiting;
  • headache, dizziness;
  • chest pain, shortness of breath or swollen limbs due to an effect on the heart;
  • increased sensitivity of your skin to sun and ultraviolet light (photosensitivity).

Very rare (may affect up to 1 in 10,000 people):

  • problems with kidney function, sometimes with swollen limbs or flank pain;
  • severe abdominal pain because of acute inflammation of the pancreas;
  • worsening of colitis symptoms;
  • fever, sore throat or feeling sick due to changes in blood count;
  • shortness of breath, cough, wheezing, spot in the lungs upon x-ray due to allergic and/or inflammatory conditions in the lungs;
  • diarrhoea and severe abdominal pain due to an allergic reaction to medicine at the bowel level;
  • skin rash or inflammation;
  • muscle and joint pain;
  • jaundice or abdominal pain, due to liver or bile flow disorders;
  • hair loss and development of baldness;
  • erythema multiforme;
  • numbness and tingling of the fingers and toes (peripheral neuropathy);
  • reversible decrease in semen production;
  • blood count disorders.

Unknown frequency (it cannot be estimated from the available data):

  • kidney stones and associated kidney pain (see also section 2);
  • severe cutaneous adverse reactions: Drug reaction with eosinophilia and systemic symptoms (DRESS),

    Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN).

Photosensitivity

More severe reactions have been reported in patients with pre-existing skin conditions, such as atopic dermatitis and atopic eczema.

If these symptoms continue or become more severe, check with your doctor.

Reporting of side effects

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects, you can help provide more information on the safety of this medicine.

5. How to store Salcrozine

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

This medicine does not require any special storage conditions.

Do not use this medicine after the expiry date which is stated on the carton and blister after EXP. The expiry date refers to the last day of that month.

Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

6. Contents of the pack and other information

What Salcrozine contains

  • The active substance is mesalazine
  • Each gastro-resistant tablet contains 500 mg of mesalazine
  • The other ingredients are anhydrous sodium carbonate, glycine, povidone, microcrystalline cellulose, croscarmellose sodium, silica, colloidal anhydrous, calcium stearate, methacrylic acid - ethyl acrylate copolymer (1:1) dispersion 30 per cent, methacrylic acid - methyl methacrylate copolymer (1:1), methacrylic acid - methyl methacrylate copolymer (1:2), dibutyl sebacate, talc, titanium dioxide (E-171), macrogol, yellow iron oxide (E-172) and red iron oxide (E-172).

What Salcrozine looks like and contents of the pack

Salcrozine are oblong, orange coloured coating gastro-resistant tablets.

This medicine is marketed in OPA/Alu/PVC/Alu blister packed in cartons containing 100 gastro-resistant tablets.

Marketing Authorisation Holder Manufacturer

Faes Farma, S.A. Faes Farma, S.A.

Autonomia Etorbidea, 10 Parque Científico y Tecnológico de Bizkaia 48940 Leioa (Bizkaia) Ibaizabal Bidea, Edificio 901 Spain 48160 Derio (Bizkaia)

Spain

Distributor

Galen Limited

Seagoe Industrial Estate

Craigavon

BT63 5UA

UK(NI)

This medicine is authorised in the Member States of the European Economic Area and in the United Kingdom (Northern Ireland) under the following names:

Austria: Azzavix 500 mg magensaftresistente tablette

Czechia: Salcrozine

Ireland: Galtasa 500 mg gastro-resistant tablets

Poland: Salaza

Slovakia: Salcrozine 500 mg gastrorezistentná tableta

Spain: Mecolvix 500 mg comprimidos gastroresistentes

Greece: Mecolzin 500 mg γαστροανθεκτικό δισκίο

United Kingdom (Northern Ireland): Salcrozine 500 mg gastro-resistant tablets

This leaflet was last revised in December 2024.

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 18945/0002

Last revision stated in the text: December 2024 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Salcrozine 500 mg gastro-resistant tablets

Prescription needed? Yes, prescription-only medicine (POM)
Active substance Mesalazine
Strength 500 mg
Pharmaceutical form Gastro-resistant tablet
Oblong tablets of 17.9 mm of length and 8.3 mm of diameter, with homogeneous gastro-resistant orange coloured coating.
How is it taken Oral
Excipients Sodium carbonate, anhydrous, Glycine, Povidone, Cellulose, microcrystalline, Croscarmellose sodium, Silica, colloidal anhydrous, Calcium stearate, Methacrylic acid - Ethyl acrylate copolymer (1:1) dispersion 30 per cent Methacrylic acid - Methyl methacrylate copolymer (1:1) Methacrylic acid - Methyl methacrylate copolymer (1:2) Dibutyl sebacate, Talc, Titanium dioxide (E-171), Macrogol, Yellow iron oxide (E-172), Red iron oxide (E-172)
Pack sizes 100 tablet
Is it available? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Shelf life 3 years
Storage This medicinal product does not require any special storage conditions.
Drug group (ATC) Aminosalicylic acid and similar, code ATC: A07EC02
  1. A Alimentary tract and metabolism drugs
    1. A07 Antidiarrheals, intestinal antiinflammatory/antiinfective agents
      1. A07E Intestinal antiinflammatory agents
        1. A07EC Aminosalicylic acid and similar agents
          1. A07EC02 mesalazine
Marketing authorisation PL 18945/0002 (first authorised 16 January 2024)
Marketing authorisation holder Faes Farma, S.A.
Codes GTIN 8436024614572 · BNF 01050100

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 10.1.0 of 12 October 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.