Package Leaflet: Information for the User
Asacol 1600 mg Gastro-Resistant Tablets
mesalazine
Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.
Contents of the pack and other information
Asacol contains the active substance mesalazine. It is an anti-inflammatory drug used to treat ulcerative colitis. Ulcerative colitis is a disease in which the lining of the large intestine (colon) or the final part of the large intestine (rectum) becomes inflamed (red and swollen). This can cause frequent bowel movements with blood along with abdominal cramps.
Asacol is indicated for the treatment of the acute phase of mild to moderate ulcerative colitis and for the maintenance of remission.
Do not take Asacol if:
Warnings and precautions
Consult your doctor or pharmacist before starting to take Asacol if you have any medical problem or disease, especially if:
If you experience severe headache or recurrent headache, vision changes or ringing or buzzing in the ears, contact your doctor immediately.
Severe skin rashes, such as drug reaction with eosinophilia and systemic symptoms (DRESS), Stevens-Johnson syndrome (SSJ), and toxic epidermal necrolysis (NET), have been observed with mesalazine treatment. Stop taking mesalazine and seek medical attention immediately if you observe any of the symptoms related to these severe skin reactions described in section 4.
Mesalazine may cause a discoloration of the urine to a reddish-brown color after contact with sodium hypochlorite bleach in the toilet water. This is a chemical reaction between mesalazine and bleach and is harmless.
Assessment of your liver, kidneys, and blood
Before and during treatment with Asacol, your doctor may want to assess you from time to time to check that your liver, kidneys, blood, and lungs are in good condition.
Children and adolescents
Do not give this medicine to children or adolescents under 18 years of age, as Asacol has not been tested in this age group.
Other medicines and Asacol
Tell your doctor or pharmacist if you are using, have recently used, or might use any other medicines.
Using Asacol with food and drinks
Consumption of food, drinks, or alcohol does not interfere with the consumption of Asacol.
Pregnancy and breastfeeding
If you are pregnant or breastfeeding, think you may be pregnant, or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.
Mesalazine is excreted in breast milk in small amounts, so special caution is recommended if Asacol is used during breastfeeding. If the baby develops diarrhea, breastfeeding should be discontinued.
Driving and using machines
Asacol has no or negligible influence on the ability to drive and use machines. However, if you feel affected, you should not drive or use machines.
Asacol contains sodium
This medicine contains less than 23 mg of sodium (1 mmol) per tablet; this is essentially "sodium-free"
Follow the instructions for administration of this medicine exactly as prescribed by your doctor. If you are unsure, consult your doctor or pharmacist again.
Your doctor will inform you about the dose you should take.
The recommended dose is:
Adults
Active phase of the disease:When the disease is worsening, the dose may be increased up to 4800 mg (3 tablets) per day, taken in one dose or divided into 2-3 doses per day.
Maintenance treatment:1600 mg once a day.
Use in children and adolescents:
The efficacy and safety of Asacol in children and adolescents under 18 years of age have not been established.
Asacol is not recommended for use in children and adolescents.
The tablets should be swallowed whole with a glass of water. Do not chew, crush, or break the tablets before swallowing. The tablets have a modified release in time, so if not taken correctly, they may not exert the necessary action.
Asacol can be taken with or without food.
If you take more Asacol than you should:
In case of overdose or accidental ingestion, consult your doctor or pharmacist or go to the nearest hospital, or call the Toxicology Information Service. Phone 91 562 04 20 (indicating the medicine and the amount ingested). It is recommended to bring the package and the package leaflet of the medicine to the healthcare professional.
The symptoms of overdose of this medicine are: ringing in the ears, dizziness, headache, confusion, drowsiness, excess fluid in the lungs, dehydration due to sweating, diarrhea, and vomiting, low blood sugar levels, rapid and deep breathing, changes in body water or electrolyte content and blood pH, and abnormally high body temperature.
Your doctor will treat the symptoms of overdose of this medicine.
If you forget to take Asacol
If you have forgotten to take a dose, take the next dose at the usual time. Do not take a double dose to make up for forgotten doses.
If you stop taking Asacol
Take Asacol until your doctor has prescribed it. Inform your doctor before changing or stopping treatment.
If you have any further questions on the use of this product, ask your doctor or pharmacist.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Stop taking Asacol immediately and consult your doctor if
you develop one or more of the following symptoms:
Tell your doctor immediately ifyou experience severe headache or recurrent headache, vision changes, or ringing or buzzing in the ears. These could be symptoms of increased pressure inside your skull (idiopathic intracranial hypertension) (frequency not known [cannot be estimated from the available data]).
Asacol may, in very rare cases, affect the white blood cells, so your immune system may worsen. If you contract an infection with symptoms such as fever with severe worsening of your general condition or fever with local symptoms of infection such as sore throat/pharynx/mouth or urinary problems, you should consult your doctor immediately. Blood tests may be performed to check for the absence of white blood cells (agranulocytosis). It is important that you inform your doctor about all your medicines.
Other side effects:
Common: may affect up to 1 in 10 people
Uncommon: may affect up to 1 in 100 people
Rare: may affect up to 1 in 1,000 people
Very rare: may affect up to 1 in 10,000 people
Frequency not known: frequency cannot be estimated from the available data
Reporting of side effects:
If you experience any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Spanish Pharmacovigilance System for Human Use Medicines: http://www.notificaRAM.es.
By reporting side effects, you can help provide more information on the safety of this medicine.
Keep this medicine out of the sight and reach of children.
Do not use this medicine after the expiry date which is stated on the carton after EXP. The expiry date is the last day of the month shown.
This medicine does not require any special storage conditions.
Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to dispose of medicines no longer required. These measures will help protect the environment.
Composition of Asacol 1600 mg Gastro-Resistant Tablets
magnesium stearate (E 470B)
methacrylic acid - methyl methacrylate copolymer (1:2)
trietin
yellow iron oxide (E 172)
red iron oxide (E 172)
macrogol
microcrystalline cellulose
glycerol monostearate 40-55
hypromellose
corn starch
polysorbate 80
potassium dihydrogen phosphate
colloidal anhydrous silica
sodium carboxymethyl starch (type A).
Appearance and packaging
Asacol 1600 mg Gastro-Resistant Tablets are reddish-brown in color. The tablets are oblong in shape and have an approximate length of 2.3 cm and a thickness of 1.1 cm.
The tablets are available in boxes and blister packs. The blister packs are packaged in cardboard boxes of 30 tablets, 60 tablets, or 90 tablets.
Not all pack sizes may be marketed.
Marketing authorization holder
Tillotts Pharma Spain, S.L.U.
Travessera de Gràcia 58, 5º 3ª
08006 Barcelona
Manufacturer
HAUPT PHARMA WULFING GMBH
Bethelner Landstrasse, 18
Gronau D-31028
GERMANY
Or
Tillotts Pharma GmbH
Warmbacher Str. 80
Rheinfelden DE - 79618
GERMANY
Date of last revision of this leaflet:May 2025
Detailed and up-to-date information on this medicine is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) http://www.aemps.gob.es/
The average price of ASACOL 1600 mg GASTRO-RESISTANT TABLETS in October, 2025 is around 106.09 EUR. Prices may vary depending on the region, pharmacy, and whether a prescription is required. Always check with a local pharmacy or online source for the most accurate information.