Mesalazina
Asacol, Octasa, Pentasa
Revisione paritaria di Sid DajaniUltimo aggiornamento di Michael Stewart, MRPharmSUltimo aggiornamento 22 Feb 2025
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There are a number of different brands of mesalazine, some of which work in different ways. This means that your treatment could be affected by switching between some brands. Each time you collect a new supply from your pharmacy, check to see if it is the same brand as before. If it is different, discuss this with your pharmacist who will advise you.
It is important that you keep your regular appointments with your doctor so that your progress can be checked. You may require regular blood tests.
Common side-effects include gastrointestinal symptoms and aches and pains. These tend to be minor.
Rarely, mesalazine can cause problems with your blood. You should tell your doctor immediately if you have any unexplained bleeding, bruising, red or purple discolourations of the skin, sore throat, a high temperature (fever), or if you feel generally unwell.
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About mesalazine
Tipo di medicinale | An aminosalicylate |
Utilizzato per | Ulcerative colitis and Crohn's ileo-colitis |
Chiamato anche | Mesalamine (in US); Asacol®, Mezavant®, Octasa®, Pentasa®, Salcrozine®, Salofalk®, Zintasa® |
Disponibile come | Tablets, granules (sachets), suppositories, enemas, and foam enemas (rectal foam) |
Ulcerative colitis causes inflammation of the intestine which leads to problems such as ulceration and bleeding. This causes symptoms such as abdominal pain and diarrhoea. morbo di Crohn is a condition which causes inflammation of any part of the gastrointestinal system. When the inflammation is in the area where the small intestine joins the large intestine, then it is called Crohn's ileo-colitis. Aminosalicilati are a group of medicines commonly used to treat inflammatory bowel diseases such as these. Mesalazine is one of the most commonly used aminosalicylates.
Although it is not clear exactly how mesalazine works, it is thought to act on cells lining the intestine to change the way these cells make and release certain chemicals. These chemicals are thought to be a factor in causing the symptoms of ulcerative colitis. Mesalazine allows the damaged intestine to recover and helps to prevent symptoms from flaring up again.
There are a number of different mesalazine preparations and brands. The way the manufacturers make each of these brands differs slightly; this allows the different brands to release mesalazine in specific areas of the intestine. You will be prescribed the brand that allows mesalazine to be released in the part of your intestine which requires it most.
Mesalazine can be taken by mouth as granules or tablets, or it can be given into the back passage as a suppository, rectal foam or enema.
Before taking mesalazine
Torna ai contenutiSome medicines are not suitable for people with certain conditions, and sometimes a medicine can only be used if extra care is taken. For these reasons, before you start taking mesalazine it is important that your doctor knows:
If you are pregnant or breastfeeding. (Although mesalazine is unlikely to be harmful to babies, it is still important that you tell your doctor if you are expecting or breastfeeding a baby.)
Se hai problemi con il funzionamento del tuo fegato, o se hai problemi con il funzionamento dei tuoi reni.
Se hai problemi con la respirazione.
If you have ever had an allergic reaction to a medicine. It is particularly important that you tell your doctor if you have had an unusual reaction to aspirin or a salicylate.
Se stai assumendo o utilizzando altri medicinali. Questo include qualsiasi medicinale che stai assumendo e che è disponibile per l'acquisto senza prescrizione, così come i medicinali a base di erbe e complementari.
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How to take mesalazine
Torna ai contenutiBefore you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about mesalazine, and it will also provide you with a full list of the side-effects which you could experience.
Your dose will depend upon which brand of mesalazine has been prescribed for you. Your doctor will tell you how much to take and when to take it, and these directions will also be printed on the label of the pack to remind you about what the doctor said to you. Take mesalazine exactly as your doctor tells you to.
Some mesalazine tablets and granules are specially coated to pass through your stomach before they are absorbed. These must be swallowed whole and not broken, chewed or crushed. Check the label on your pack carefully and follow any advice it gives. Also, do not take any indigestion remedies within two hours of taking your doses (either before or after), as this will interfere with the special coating.
If you have been given the Mezavant® XL brand of tablets, you should take these after a meal. If you have been given any other brand of tablet, it is unimportant whether you take them before or after a meal.
If you have been given granules, place the correct amount on to your tongue and wash them down with a drink of water. Do not chew the granules. You can take them either before or after meals. Alternatively the entire contents of the sachet can be poured onto a yoghurt and eaten straightaway.
Se dimentichi di prendere una dose, prendila appena te ne ricordi (a meno che non sia quasi ora della dose successiva, in tal caso salta la dose dimenticata e prendi la dose successiva come di consueto). Non prendere due dosi insieme per compensare una dose dimenticata.
How to use mesalazine enema
Shake the enema and release the seal on the nozzle.
Lie down on one side and draw your top knee up towards your chest. Insert the enema nozzle into your back passage.
Squeeze the bottle gently to completely empty the contents. This will take around 30-40 seconds. Remove the nozzle from your back passage. Remain where you are for about 5-10 minutes until the urge to pass the enema has eased.
Throw away the empty enema bottle in a plastic bag (these are provided with some brands of enema).
Lavati le mani.
How to use mesalazine foam enema
Shake the can well to mix the contents.
Before you use the can for the first time, remove the plastic safety lock.
Push the plastic applicator on to the nozzle of the can.
Stand up and place one foot on a firm surface, such as a chair.
Hold the canister upside down (with the dome facing down) in the palm of your hand.
Insert the applicator into your back passage as far as is comfortable.
Push the dome once and release it. This will release one dose of the foam. Repeat if you need two doses.
Remove the applicator and place it in one of the plastic bags provided and dispose of it in a bin.
Lavati le mani.
How to use mesalazine suppositories
Remove the suppository from the packaging.
Using your finger, gently push the suppository into your back passage (rectum). Some people find it helps to squat, or to lie down on one side and draw their knees up towards their chest to do this.
Push the suppository in as far as is comfortable. You may have the urge to pass the suppository out again but this should ease after a few minutes.
Lavati le mani.
Ottenere il massimo dal tuo trattamento
Torna ai contenutiEach time you collect a new supply from your pharmacy, check to see if it is the same brand as before. If it is different, discuss this with your pharmacist who will advise you.
Try to keep your regular appointments with your doctor and clinic. This is so your doctor can check on your progress. Your doctor will want you to have regular blood tests during the treatment.
Treatment with mesalazine may be long-term to prevent symptom flare-ups. Continue to take/use it unless you are advised otherwise.
Your doctor may advise you make some changes to your diet as part of your treatment. This can include a special diet or a nutritional supplement.
It is important to stay hydrated whilst being treated with mesalazine, ensure you drink the recommended amount of fluids each day.
You may notice a red-brown discolouration of urine when in contact with certain bleaches used to clean toilets. This is not harmful.
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Can mesalazine cause problems?
Torna ai contenutiAlong with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains the most common ones associated with mesalazine. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Common mesalazine side-effects (these affect fewer than 1 in 10 people) | Cosa posso fare se sperimento questo? |
Indigestion, feeling sick (nausea) or being sick (vomiting), tummy (abdominal) pain | Attieniti a cibi semplici - evita pasti ricchi o piccanti |
Diarrea | Bevi molta acqua per reintegrare i liquidi persi |
Mal di testa, dolori muscolari e dolori | Bevi molta acqua e chiedi al tuo farmacista di consigliarti un antidolorifico adatto. Se i dolori persistono, informa il tuo medico |
Importante: rarely, mesalazine can cause problems with your blood. You should contact your doctor immediately if you have any unexplained bleeding, bruising, red or purple discolourations of your skin, an unexplained sore throat or high temperature (fever), or if you feel generally unwell during the treatment.
In rare cases mesalazine can cause serious allergic skin reactions. Contact your doctor if you develop any signs of an allergic reaction including skin rashes and mouth ulcers.
Se si verificano altri sintomi che ritieni possano essere dovuti al medicinale, parla con il tuo medico o farmacista per ulteriori consigli.
How to store mesalazine
Torna ai contenutiTenere tutti i medicinali fuori dalla portata e dalla vista dei bambini.
Conservare in un luogo fresco e asciutto, lontano da fonti di calore e luce diretta.
Informazioni importanti su tutti i medicinali
Torna ai contenutiInformazioni importanti su tutti i medicinali
Se acquisti dei medicinali, verifica con un farmacista che siano sicuri da assumere insieme agli altri tuoi medicinali.
Never take more than the prescribed dose. If you suspect that you or someone else might have taken an overdose of this medicine go to the accident and emergency department of you local hospital at once. Take the container with you, even if it is empty.
Se devi sottoporti a un'operazione o a un trattamento dentistico, informa la persona che esegue il trattamento sui medicinali che stai assumendo.
Questo medicinale è per te. Non darlo mai ad altre persone, anche se la loro condizione sembra essere la stessa della tua.
Non conservare medicinali scaduti o indesiderati. Portali alla tua farmacia locale che li smaltirà per te.
Se hai domande su questo medicinale, chiedi al tuo farmacista.
Segnala effetti collaterali di un medicinale o vaccino
Se si verificano effetti collaterali, è possibile segnalarli online tramite il sito web Yellow Card.

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Ulteriori letture e riferimenti
- Manufacturer's PIL, Octasa® 400 mg MR Tablets; Tillotts Pharma UK Limited, electronic Medicines Compendium. Dated January 2023.
- Manufacturer's PIL, Octasa® suppositories 1 g; Tillotts Pharma UK Limited, The electronic Medicines Compendium. Dated January 2023.
- Manufacturers PIL, Pentasa® enema; Ferring Pharmaceuticals Ltd, The electronic Medicines Compendium. Dated January 2023.
- Manufacturer's PIL, Pentasa® Sachet 1 g, 2 g and 4 g prolonged release granules; Ferring Pharmaceuticals Ltd, The electronic Medicines Compendium. Dated February 2021.
- Medicinali Completi BNF 89ª Edizione; Associazione Medica Britannica e Società Farmaceutica Reale di Gran Bretagna, Londra.
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Storia dell'articolo
Le informazioni su questa pagina sono scritte e revisionate da clinici qualificati.
Prossima revisione prevista: 22 Feb 2028
22 Feb 2025 | Ultima versione

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