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Fourrts India Laboratories Pvt Ltd - Tablet - 10 S
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Metformin (1000mg) + Methylcobalamin (750mcg)
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Rejumet 1000 Tablet is used for treatment of Type 2 diabetes mellitus.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
Rejumet 1000 Tablet contains Metformin (1000mg) + Methylcobalamin (750mcg). It belongs to the Biguanide and B-complex vitamin class of medicines.
Treatment of Type 2 diabetes mellitus
Rejumet 1000 Tablet SR is a combination of two medicines:
Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Rejumet 1000 Tablet SR should be taken with or after food.
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
If you miss a dose of Rejumet 1000 Tablet SR, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule. Do not double the dose.
An overdose of this medicine can cause a dangerous build-up of acid in the blood, with vomiting, severe weakness and laboured breathing. It is unlikely to cause serious harm, because the body passes surplus B vitamins out in the urine. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.
Most side effects of Rejumet are mild and settle as the body adjusts. Reported side effects include:
Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.
| Pregnancy | Pregnancy SAFE IF PRESCRIBED |
|---|---|
| Breastfeeding | Breast feeding CAUTION |
| Alcohol | Alcohol UNSAFE |
| Driving | Driving SAFE |
| Kidney | Kidney CAUTION |
| Liver | Liver UNSAFE |
| Habit forming | No |
Stomach upset is common in the first two weeks and usually settles; taking it with food helps. Tell your doctor before any surgery or a scan that uses contrast dye — this medicine is usually stopped for a short time around them. Stop and seek urgent care if you develop deep rapid breathing, severe weakness, muscle pain or vomiting with cold clammy skin. This is rare but serious. Long-term use can lower vitamin B12, so your doctor may check it from time to time. Tingling, numbness or burning in the hands and feet should be assessed by a doctor rather than self-treated — a supplement does not address the cause. Folic acid can mask a vitamin B12 deficiency while nerve damage continues, so B12 should be checked before taking folic acid long term. Bright yellow urine after a B-complex dose is expected and harmless.
Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Not for people with severe kidney disease, severe liver disease, or an acute illness causing dehydration. Not for people who have had diabetic ketoacidosis.
Tell your doctor about water tablets, steroids, and any contrast dye scan. Alcohol increases the risk of the rare acid build-up and should be limited. Long-term metformin, acid-reducing medicines and some anti-epileptics lower B12 or folate levels. Tell your doctor if you take levodopa, as vitamin B6 can reduce its effect.
Store below 30°C in the original pack, away from direct sunlight and moisture. Keep out of the reach of children.
Take it with food to avoid an upset stomach. It does not cause weight gain and rarely causes low blood sugar unlike other diabetes medicines. Hypoglycemia (low blood sugar level) may occur when taken along with other antidiabetic medicines, alcohol or on delaying/skipping a meal. Your doctor will monitor your blood sugar levels and kidney functions regularly while taking this medication. Tell your doctor immediately if you experience any deep or rapid breathing, or persistent nausea, vomiting, and stomach pain as Rejumet 1000 Tablet SR may cause a rare but serious condition called lactic acidosis, which is an excess of lactic acid in the blood. Always carry some sugary food or fruit juice with you in case you experience hypoglycemic symptoms such as cold sweats, cool pale skin, tremor, and anxiety.
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The information on Rejumet 1000 Tablet is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.