Recorded active ingredients: Mesalazine
Based on a snapshot of pillintrip.com listings. Country listings do not confirm current availability or registration. Sources and limitations · How matching works.
Asacol is a widely registered nonsteroidal anti-inflammatory preparation based on mesalazine, with marketing authorisation in 36 countries — a footprint that puts it in front of travellers and expatriates across Europe, North America, the Middle East, and parts of Asia. Its active ingredient is classified as a locally acting anti-inflammatory used in inflammatory bowel disease, and this page is written for international readers trying to match Asacol to what is available in the country they are currently in.
Mesalazine is prescribed in the management of ulcerative colitis and related inflammatory conditions of the colon, typically as a long-term controller medication aimed at reducing intestinal inflammation and maintaining remission. The structured indication list further down this page details the registered uses recognised across the markets where Asacol is sold.
Because Asacol is broadly distributed, travellers and expatriates often encounter the same molecule abroad — sometimes under the Asacol brand, sometimes as a different mesalazine-containing product in a different release format. Markets where Asacol is registered include Japan, Canada, Germany, Egypt, and Italy, but regulatory packaging, release profiles, and prescription pathways vary considerably between countries. A pharmacist in the destination market can confirm whether a locally available mesalazine product is an appropriate match.
Other medications within the same anti-inflammatory category used for inflammatory bowel disease also circulate internationally under various active ingredients and brand names, although they are not freely interchangeable. For anyone managing ulcerative colitis while crossing borders, decisions about substitution or continuation of therapy belong with a gastroenterologist or general practitioner who knows the patient's history, not with the pharmacy counter alone.
These listings match the full ingredient set recorded for Asacol. Strength, dosage form and route may differ or be missing. This does not establish interchangeability; confirm a suitable product with a pharmacist.
There is no specific antidote.
3 years
Not applicable.
Witepsol W45 (Hard Fat).
The side effects are predominantly gastrointestinal, including nausea, diarrhoea and abdominal pain. Headache has also been reported.
There have been rare reports of leucopenia, neutropenia, agranulocytosis, aplastic anaemia and thrombocytopenia, alopecia, peripheral neuropathy, pancreatitis, abnormalities of hepatic function and hepatitis, myocarditis and pericarditis, allergic and fibrotic lung reactions, lupus erythematosus-like reactions and rash (including urticaria), interstitial nephritis and nephrotic syndrome with oral mesalazine treatment, usually reversible on withdrawal. Renal failure has been reported. Mesalazine-induced nephrotoxicity should be suspected in patients developing renal dysfunction during treatment.
Mesalazine may very rarely be associated with an exacerbation of the symptoms of colitis, Stevens Johnson syndrome and erythema multiforme.
Other side effects observed with sulphasalazine such as depression of sperm count and function, have not been reported with Asacol.
Rarely, local irritation may occur after administration of rectal dosage forms containing mesalazine.
Reporting of suspected adverse reactions
Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme; website: www.mhra.gov.uk/yellowcard
There are no preclinical data of relevance to the prescriber which are additional to that already included in other sections of the SPC.
Mesalazine is one of the two components of sulphasalazine, the other being sulphapyridine. It is the latter which is responsible for the majority of the side effects associated with sulphasalazine therapy whilst mesalazine is known to be the active moiety in the treatment of ulcerative colitis. Asacol consists only of this active component which is delivered directly by the suppositories.
The suppository is designed to deliver mesalazine directly to the proposed site of action in the distal bowel.
February 2016
Allergan Pharmaceuticals International Limited
Clonshaugh Industrial Estate
Coolock
Dublin 17
Ireland
Store below 25°C. Protect from light.
Cartoned plastic moulds (OP), each containing 20 suppositories.
PL 45496/0003
Not applicable.
For rectal administration.
20th April 1988 / 21st May 2002
Asacol is prescribed in the management of inflammatory bowel disease, particularly ulcerative colitis and related forms of colitis. The active ingredient acts locally on inflamed bowel tissue, which places it within the anti-inflammatory category used in long-term gastrointestinal care. The structured indication section further down this page lists each registered use as recognised by national regulators in the markets where Asacol is sold.
Asacol contains mesalazine, also known internationally as mesalamine or 5-aminosalicylic acid, classified as a nonsteroidal anti-inflammatory acting locally in the bowel. Mesalazine is the same molecule whether sold under the Asacol brand or under other commercial names — internationally, the same active ingredient circulates under multiple brand names and in several modified-release formulations developed for different parts of the gastrointestinal tract.
Asacol carries marketing authorisation in 36 countries, spanning North America, Europe, the Middle East, and parts of Asia. Examples include Japan, Canada, Germany, Egypt, India, Italy, and Israel. If your country is not represented on this list, a local pharmacist can usually confirm whether mesalazine is available in that market under a different brand name, since the molecule itself is broadly registered in regulated markets worldwide.
Mesalazine is sold under several brand names worldwide, and is formulated in a range of oral and rectal preparations developed to release the active ingredient at different points in the gastrointestinal tract. Other medications within the broader anti-inflammatory category used for inflammatory bowel disease also exist, although they are not interchangeable without medical guidance. To identify a local mesalazine-containing product, search the active ingredient on Pill2Trip or ask a pharmacist in your country.
Yes. Asacol is a prescription medication, and therapy for ulcerative colitis is closely calibrated to disease activity, the affected segment of the bowel, and the individual patient's history. This matters particularly for travellers and people relocating between countries, because mesalazine formulations, release profiles, and brand names vary across regulatory regimes. Any decision to start, stop, switch, or substitute should be led by a gastroenterologist or general practitioner familiar with the patient.
