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TOLBUTAMIDE 500 mg TABLETS – patient leaflet, side effects, dosage

Updated:
Key facts
Status:
Prescription only (POM)
Medicine strength:
500 mg
Contains active substance:

Patient leaflet - Tolbutamide 500 mg tablets

1. What Tolbutamide Tablet is and what it is used for

  • medicines used to prevent blood clotting (e.g. warfarin or dicoumarol)

2. What you need to know before you take Tolbutamide Tablets

  • medicines used to treat depression such as Monoamine Oxidase Inhibitors (MAOIs), such as moclobemide
  • How to take Tolbutamide Tablets
  • Possible side effects
  • medicines used to treat mental health problems such as lithium
  • How to store Tolbutamide Tablets
  • Contents of the pack and other information
  • medicines to treat high blood pressure such as beta-blockers (e.g. propranolol, atenolol)
  • diuretics (water tablets) such as
  • WHAT TOLBUTAMIDE TABLET IS AND WHAT IT IS USED FOR

    hydrochlorothiazide, bendroflumethiazide

  • the oral contraceptive pill
  • cyclophosphamide (used to treat some cancers)

Tolbutamide is one of a group of medicines called oral hypoglycaemics. These medicines are used to control blood sugar levels in some types of diabetes.

  • salicylates (used for muscular or skeletal disorders e.g. aspirin).

Tolbutamide Tablets with food, drink and alcohol

Tolbutamide tablets may be used to control blood sugar in patients with mild to moderate diabetes, which cannot be controlled by diet alone. Tolbutamide tablets should only be used to treat diabetes which occurs mainly in adults (type 2 or non-insulin dependent diabetes).

You are advised not to drink alcohol with this medicine. Talk to your doctor if you have any questions.

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 any medicine.

If you are overweight, treatment with Tolbutamide tablets should not replace your dietary restrictions.

Driving and using machines

Make sure your blood sugar levels are under control before you drive or operate machinery.

  1. 2.

    WHAT YOU NEED TO KNOW BEFORE YOU TAKE TOLBUTAMIDE TABLETS

    Tolbutamide Tablet contains lactose

Do not take Tolbutamide tablets and tell your doctor if you:

This medicine contains lactose. If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicinal product.

  • are allergic to Tolbutamide tablets or any of the other ingredients of this medicine (listed in section 6).
  • have ever had a severe diabetic reaction (such as “acidosis” or diabetic coma)

3. HOW TO TAKE TOLBUTAMIDE TABLETS

  • have diabetes that needs to be treated by insulin (type 1 or insulin dependent diabetes)

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

  • have severe kidney, liver, thyroid or adrenal gland disease
  • suffer from a condition called porphyria have a hereditary disease affecting the liver or bone marrow

    The recommended dose is:

    Untreated diabetes

    Initially two tablets daily. The maintenance dose will depend upon your response to treatment; the usual daily dose is 1-3 tablets daily.

  • are experiencing unusual stress or are breast-feeding
  • need an operation.

    Change from other tablets

Warnings and precautions

Talk to your doctor before taking Tolbutamide tablets if:

  • you are debilitated (“run down”) or are elderly

Change from insulin

Low insulin doses (20 units) can be replaced immediately. With high insulin doses a gradual change is required. Insulin and Tolbutamide will be given together and the insulin dose will be gradually reduced.

Taking with biguanides

If you do not achieve adequate control of your diabetes through diet and 4 tablets of tolbutamide daily then your doctor may also give you a biguanide drug, such as metformin, to help you control your blood sugar levels.

Elderly

If you are elderly your doctor may have initially started your treatment on a lower dose of Tolbutamide.

Children

This medicine is not recommended for children and adolescents.

Swallow these tablets with or immediately after the first main meal of the day or in smaller doses throughout the day with meals. Take this medicine for as long as your doctor tells you to.

If you take more Tolbutamide Tablets than you should:

If you (or someone else) swallow a lot of the tablets at the same time, or if you think a child may have swallowed any, contact your nearest hospital casualty department or tell your doctor immediately. Signs of an overdose include feeling or being sick, sweating, fast breathing or heart rate, low blood pressure, odd behaviour, drowsiness, fits or coma.

If you forget to take Tolbutamide Tablets

Take it as soon as you remember, unless it is nearly time for your next dose. Then carry on as before. Do not take a double dose to make up for a forgotten dose.

If you stop taking Tolbutamide Tablets

Talk to your doctor before stopping treatment with this medicine.

If you have any further questions on the use of this medicine, ask your doctor or pharmacist.

4. POSSIBLE SIDE EFFECTS

Like all medicines, Tolbutamide Tablets can cause side effects although not everybody gets them. Stop taking Tolbutamide Tablets and contact your doctor at once if you experience:

  • An allergic reaction: skin rash, swelling of the face, lips, tongue or throat, difficulty breathing or swallowing. This is a very serious but rare side effect. You may need urgent medical attention or hospitalisation.

Tell your doctor if you notice any of the following side effects or notice any other effects not listed:

  • Blood: anaemia. Tolbutamide may change the number of certain types of cells in the blood, if you notice an increase in in the number of infections or sore throats you are getting, bruising and or nose bleeds, tell your doctor.
  • Metabolism: low blood sugar (sweating, shaking, double vision, slurred speech, confusion)
  • Ears: ringing in the ear
  • Liver: jaundice (yellowing of the skin and/or eyes), changes in liver function (as seen in blood tests)
  • Hypersensitivity effects: sensitivity to light, skin rashes
  • Nervous system: headache, tingling (pins and needles)

    • Stomach: feeling or being sick, diarrhoea, constipation, increased or decreased appetite or weight gain
    • Other effects: an intolerance to alcohol causing facial flushing.

Reporting of side effects

If you notice 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 at 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 TOLBUTAMIDE TABLETS

Keep this medicine out of the sight and reach of children. Store in the original package in order to protect from light. Do not use this medicine after the expiry date which is stated on the label. 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 Tolbutamide Tablet contains

The active substance (the ingredient that makes the tablets work) is tolbutamide. Each tablet contains 500 mg of tolbutamide.

The other ingredients are lactose, maize starch, sodium starch glycollate, magnesium stearate, stearic acid, methylcellulose, pregelatinised starch.

What Tolbutamide Tablet looks like and contents of the pack

Tolbutamide tablets are white, flat, bevel-edged tablets with MP43 engraved on one side. Tolbutamide is available in blister pack of 28 tablets or in containers of 100, 112 or 500 tablets. Not all pack sizes may be marketed.

Marketing Authorisation Holder

Genethics Europe Limited,

41 - 43 Klimentos, Klimentos Tower,

Nicosia 1061, Cyprus

Manufacturer

Haupt Pharma Berlin GmbH,

Moosrosenstraße 7

12347 Berlin, Germany

For more information about this product, please contact the Marketing Authorisation Holder.

This leaflet was last revised in 05/2020.

GE0062/O/PIL/GE4

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk)

Last revision stated in the text: May 2020

What the sections and the side effect frequencies mean: How to read a patient leaflet

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 Tolbutamide 500 mg tablets

What these facts mean

Prescription needed?? Yes, prescription-only medicine (POM)
Active substance? Tolbutamide
Strength? 500 mg
Pharmaceutical form? Oral tablet
Flat, white, bevelled odourless tablets. Engraved MP43 on one side.
How is it taken? Oral
Excipients? Lactose monohydrate, Maize starch, Methylcellulose, Starch, pregelatinised, Sodium starch glycollate type A Magnesium stearate, Stearic acid
Is it available?? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Shelf life? Containers: 36 months
Blister packs: 36 months
Storage Store in the original package in order to protect from light
Drug group (ATC)? Sulfonylureas
  1. A Alimentary tract and metabolism drugs
    1. A10 Drugs used in diabetes
      1. A10B Blood glucose lowering drugs, excl. insulins
        1. A10BB Sulfonylureas for blood glucose lowering
          1. A10BB03 tolbutamide
Marketing authorisation? PL 42976/0062 (first authorised 20 February 2009)
Marketing authorisation holder? Genethics Europe Limited
Codes? BNF 06010201

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 11.1.0 of 9 November 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.