Patient leaflet - Dimethyl Fumarate Torrent 120 mg gastro-resistant hard capsules
1. What Dimethyl fumarate is and what it is used for
What Dimethyl fumarate is
Dimethyl fumarate is a medicine that contains the active substance dimethyl fumarate. What Dimethyl fumarate is used for
Dimethyl fumarate is used to treat relapsing-remitting multiple sclerosis (MS) in patients aged 13 years and older.
MS is a long-term condition that affects the central nervous system (CNS), including the brain and the spinal cord. Relapsing-remitting MS is characterised by repeated attacks (relapses) of nervous system symptoms. Symptoms vary from patient to patient, but typically include walking difficulties, feeling off balance and visual difficulties (e.g. blurred or double vision). These symptoms may disappear completely when the relapse is over, but some problems may remain.
How Dimethyl fumarate works
Dimethyl fumarate seems to work by stopping the body’s defence system from damaging your brain and spinal cord. This may also help to delay future worsening of your MS
2. What you need to know before you take Dimethyl fumarate
Do not take Dimethyl fumarate
if you are allergic to dimethyl fumarate or any of the other ingredients of this medicine (listed in
if you are suspected to suffer from a rare brain infection called progressive multifocal
leukoencephalopathy (PML) or if PML has been confirmed.
Warnings and precautions
Dimethyl fumarate may affect your white blood cell counts, your kidneys and liver. Before you start Dimethyl fumarate, your doctor will do a blood test to count the number of your white blood cells and will check that your kidneys and liver are working properly. Your doctor will test these periodically during treatment. If your number of white blood cells decreases during treatment, your doctor may consider additional tests or discontinue your treatment.
Talk to your doctor before taking Dimethyl fumarate if you have:
- severe kidney disease
- severe liver disease
- a disease of the stomach or bowel
- a serious infection (such as pneumonia)
Herpes zoster (shingles) may occur with Dimethyl fumarate treatment. In some cases, serious complications have occurred. You should inform your doctor immediately if you suspect you have any symptoms of shingles.
If you believe your MS is getting worse (e.g. weakness or visual changes) or if you notice any new symptoms, talk to your doctor straight away because these may be the symptoms of a rare brain infection called PML. PML is a serious condition that may lead to severe disability or death. A rare but serious kidney disorder called Fanconi Syndrome has been reported with a medicine containing dimethyl fumarate, in combination with other fumaric acid esters, used to treat psoriasis (a skin disease). If you notice you are passing more urine, are thirstier and drinking more than normal, your muscles seem weaker, you break a bone, or just have aches and pains, talk to your doctor as soon as possible so that this can be investigated further.
Children and adolescents
Do not give this medicine to children below 10 years of age because no data are available in this age group.
Other medicines and Dimethyl fumarate
Tell your doctor, nurse or pharmacist if you are taking, have recently taken or might take any other medicine, in particular:
- medicines that contain fumaric acid esters (fumarates) used to treat psoriasis;
medicines that affect the body’s immune system including chemotherapy, immunosuppressants,
or other medicines used to treat MS;
medicines that affect the kidneys including some antibiotics (used to treat infections), “water
tablets” (diuretics), certain types of painkillers (such as ibuprofen and other similar anti-inflammatories and medicines purchased without a doctor’s prescription) and medicines that contain lithium;
taking Dimethyl fumarate with certain types of vaccines (live vaccines) may cause you to get an
infection and should, therefore, be avoided. Your doctor will advise whether other types of vaccines (non-live vaccines) should be given.
Dimethyl fumarate with alcohol
Consumption of more than a small amount (more than 50 ml) of strong alcoholic drinks (more than 30% alcohol by volume, e.g. spirits) should be avoided within an hour of taking Dimethyl fumarate, as alcohol can interact with this medicine. This could cause inflammation of the stomach (gastritis), especially in people already prone to gastritis.
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, nurse or pharmacist for advice before taking this medicine.
Pregnancy
There is limited information about the effects of this medicine on the unborn child if used during pregnancy. Do not use Dimethyl fumarate if you are pregnant unless you have discussed this with your doctor and this medicine is clearly necessary for you.
Breast-feeding
It is not known whether the active substance of Dimethyl fumarate passes into breast milk. Your doctor will advise whether you should stop breast-feeding, or stop using Dimethyl fumarate. This involves balancing the benefit of breast-feeding for your child, and the benefit of therapy for you. Driving and using machines
Dimethyl fumarate is not expected to affect your ability to drive and use machines. Dimethyl fumarate contains sodium
This medicine contains less than 1 mmol sodium (23 mg) per capsule, that is to say essentially ‘sodium free’.
3. How to take Dimethyl fumarate
Always take this medicine exactly as your doctor has told you. Check with your doctor if you are not sure. Starting dose: 120 mg twice a day.
Take this starting dose for the first 7 days, then take the regular dose.
Regular dose: 240 mg twice a day.
Dimethyl fumarate is for oral use
Swallow each capsule whole, with some water. Do not divide, crush, dissolve, suck or chew the capsule as this may increase some side effects.
Take Dimethyl fumarate with food – it may help to reduce some of the very common side effects (listed in section 4).
If you take more Dimethyl fumarate than you should
If you have taken too many capsules, talk to your doctor straight away. You may experience side effects similar to those described below in section 4.
If you forget to take Dimethyl fumarate
If you forget or miss a dose, do not take a double dose.
You may take the missed dose if you leave at least 4 hours between the doses. Otherwise wait until your next planned dose.
If you have any further questions on the use of this medicine, ask your doctor, nurse or pharmacist.
4. Possible side effects
Like all medicines, this medicine can cause side effects, although not everybody gets them. Serious side effects
Dimethyl fumarate may lower lymphocyte counts (a type of white blood cell). Having a low white blood
cell count can increase your risk of infection, including the risk of a rare brain infection called progressive multifocal leukoencephalopathy (PML). PML may lead to severe disability or death. PML has occurred after 1 to 5 years of treatment and so your physician should continue to monitor your white blood cells throughout your treatment, and you should remain observant of any potential symptoms of PML as described below. The risk of PML may be higher if you have previously taken a medicine impairing the functionality of your body’s immune system.
The symptoms of PML may be similar to an MS relapse. Symptoms may include new or worsening weakness on one side of the body; clumsiness; changes in vision, thinking, or memory; or confusion or personality changes, or speech and communication difficulties lasting for more than several days. Therefore, if you believe your MS is getting worse or if you notice any new symptoms while you are on Dimethyl fumarate treatment, it is very important that you speak to your doctor as soon as possible. Also speak with your partner or caregivers and inform them about your treatment. Symptoms might arise that you might not become aware of by yourself.
➔ Call your doctor straight away if you experience any of these symptoms
Severe allergic reactions
The frequency of severe allergic reactions cannot be estimated from the available data (not known). Reddening of the face or body (flushing) is a very common side effect. However, should flushing be accompanied by a red rash or hives and you get any of these symptoms:
- swelling of the face, lips, mouth or tongue (angioedema)
- wheezing, difficulty breathing or shortness of breath (dyspnoea, hypoxia)
- dizziness or loss of consciousness (hypotension)
then this may represent a severe allergic reaction (anaphylaxis)
➔ Stop taking Dimethyl fumarate and call a doctor straight away
Other side effects
Very common (may affect more than 1 in 10 people)
- reddening of the face or body feeling warm, hot, burning or itchy (flushing)
- loose stools (diarrhoea)
- feeling sick (nausea)
- stomach pain or stomach cramps
➔ Taking your medicine with food can help to reduce the side effects above
Substances called ketones, which are naturally produced in the body, very commonly show up in urine tests while taking Dimethyl fumarate.
Talk to your doctor about how to manage these side effects. Your doctor may reduce your dose. Do not reduce your dose unless your doctor tells you to.
Common (may affect up to 1 in 10 people)
- inflammation of the lining of the intestines (gastroenteritis)
- being sick (vomiting)
- indigestion (dyspepsia)
- inflammation of the lining of the stomach (gastritis)
- gastrointestinal disorder
- burning sensation
- hot flush, feeling hot
- itchy skin (pruritus)
- rash
- pink or red blotches on the skin (erythema)
- hair loss (alopecia)
Side effects which may show up in your blood or urine tests
- low levels of white blood cells (lymphopenia, leucopenia) in the blood. Reduced white blood cells could mean your body is less able to fight an infection. If you have a serious infection (such as pneumonia), talk to your doctor immediately
- proteins (albumin) in urine
- increase in levels of liver enzymes (ALT, AST) in the blood
Uncommon (may affect up to 1 in 100 people)
- allergic reactions (hypersensitivity)
- reduction in blood platelets
Rare (may affect up to 1 in 1,000 people)
- liver inflammation and increase in levels of liver enzymes (ALT or AST in combination with bilirubin) Not known (frequency cannot be estimated from the available data)
- herpes zoster (shingles) with symptoms such as blisters, burning, itching or pain of the skin, typically on one side of the upper body or the face, and other symptoms, like fever and weakness in the early stages of infection, followed by numbness, itching or red patches with severe pain
- runny nose (rhinorrhoea)
Children (13 years of age and above) and adolescents
The side effects listed above also apply to children and adolescents.
Some side effects were reported more frequently in children and adolescents than in adults, e.g, headache, stomach pain or stomach cramps, being sick (vomiting), throat pain, cough, and painful menstrual periods.
Reporting of side effects
If you get any side effects, talk to your doctor, nurse or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via Yellow Card Scheme at 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 Dimethyl fumarate
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 blister and the carton after “EXP”. The expiry date refers to the last day of that month.
This medicinal product does not require any special storage conditions.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to dispose of medicines you no longer use. These measures will help protect the environment.
6. Contents of the pack and other information
What Dimethyl fumarate contains
The active substance is dimethyl fumarate.
Dimethyl fumarate 120 mg: Each capsule contains 120 mg of dimethyl fumarate. Dimethyl fumarate 240 mg: Each capsule contains 240 mg of dimethyl fumarate. The other ingredients are silicified microcrystalline cellulose, croscarmellose sodium, silica colloidal anhydrous, magnesium stearate, methacrylic acid - methyl methacrylate copolymer (1:1), triethyl citrate, methacrylic acid - ethyl acrylate copolymer (1:1) dispersion 30 per cent, Sodium laurilsulfate, Polysorbate 80, talc, gelatin, iron oxide yellow (E172), titanium dioxide (E171), brilliant blue FCF (E133), iron oxide black (E172), shellac, propylene glycol, potassium hydroxide.
What Dimethyl fumarate looks like and contents of the pack
Dimethyl fumarate 120 mg gastro-resistant hard capsules are Size ‘0’ hard gelatin capsule having green cap and white body imprinted with “B47” on the cap and “120 mg” on the body in black ink, containing white to off white coated cylindrical mini-tablets.
Dimethyl fumarate 240 mg gastro-resistant hard capsules are Size ‘0el’ hard gelatin capsule having green cap and green body imprinted with “B48” on the cap and “240 mg” on the body in black ink, containing white to off white coated cylindrical mini-tablets.
Dimethyl fumarate 120 mg gastro-resistant hard capsules are available in Aluminium (OPA/Alu/PVC)
- Aluminium blister and White Opaque PVC/PE/PVDC - Aluminium blister placed into cardboard boxes containing 14 gastro-resistant hard capsules.
Dimethyl fumarate 240 mg gastro-resistant hard capsules are available in Aluminium (OPA/Alu/PVC)
- Aluminium blister and White Opaque PVC/PE/PVDC - Aluminium blister placed into cardboard boxes containing 14, 56 and 168 gastro-resistant hard capsules.
Not all pack sizes may be marketed.
Marketing Authorisation Holder and Manufacturer
Torrent Pharma (UK) Ltd.
3rd Floor, Nexus Building
4 Gatwick Road Crawley
West Sussex
RH10 9BG
United Kingdom
This leaflet was last revised in 01/2026.
Other sources of information
To listen to or request a copy of this leaflet in Braille, large print or audio please call, free of charge: 0800 198 5000
Please be ready to give the following information:
Product name Reference number
Dimethyl fumarate Torrrent 120 mg gastro-resistant hard capsules PL 36687/0516 Dimethyl fumarate Torrrent 240 mg gastro-resistant hard capsules PL 36687/0517 This is a service provided by the Royal National Institute of the Blind.
8100225-7803
Colour Black