Risk of lactic acidosis
Vildagliptin/Metformin may cause a very rare, but very serious side effect called lactic acidosis, particularly if your kidneys are not working properly. The risk of developing lactic acidosis is also increased with uncontrolled diabetes, serious infections, prolonged fasting or alcohol intake, dehydration (see further information below), liver problems and any medical conditions in which a part of the body has a reduced supply of oxygen (such as acute severe heart disease).
If any of the above apply to you, talk to your doctor for further instructions.
Stop taking Vildagliptin/Metformin for a short time if you have a condition that may be associated with dehydration (significant loss of body fluids) such as severe vomiting, diarrhoea, fever, exposure to heat or if you drink less fluid than normal. Talk to your doctor for further instructions.
Stop taking Vildagliptin/Metformin and contact a doctor or the nearest hospital immediately if you experience some of the symptoms of lactic acidosis, as this condition may lead to coma.
Symptoms of lactic acidosis include:
- vomiting
- stomach ache (abdominal pain)
- muscle cramps
- a general feeling of not being well with severe tiredness
- difficulty in breathing
- reduced body temperature and heartbeat
Lactic acidosis is a medical emergency and must be treated in a hospital.
Talk to your doctor promptly for further instructions if:
- You are known to suffer from a genetically inherited disease affecting mitochondria (the energy-producing components within cells) such as MELAS syndrome (Mitochondrial Encephalopathy, myopathy, Lactic acidosis and Stroke-like episodes) or Maternal inherited diabetes and deafness (MIDD).
- You have any of these symptoms after starting metformin: seizure, declined cognitive abilities, difficulty with body movements, symptoms indicating nerve damage (e.g. pain or numbness), migraine and deafness.
Vildagliptin/Metformin is not a substitute for insulin. Therefore, you should not receive Vildagliptin/Metformin for the treatment of type 1 diabetes.
Talk to your doctor, pharmacist or nurse before taking Vildagliptin/Metformin if you have or have had a disease of the pancreas.
Talk to your doctor, pharmacist or nurse before taking Vildagliptin/Metformin if you are taking an anti-diabetic medicine known as a sulphonylurea. Your doctor may want to reduce your dose of the sulphonylurea when you take it together with Vildagliptin/Metformin in order to avoid low blood glucose (hypoglycaemia).
If you have previously taken vildagliptin but had to stop taking it because of liver disease, you should not take this medicine.
Diabetic skin lesions are a common complication of diabetes. You are advised to follow the recommendations for skin and foot care that you are given by your doctor or nurse. You are also advised to pay particular attention to new onset of blisters or ulcers while taking Vildagliptin/Metformin. Should these occur, you should promptly consult your doctor.
If you need to have major surgery you must stop taking Vildagliptin/Metformin during and for some time after the procedure. Your doctor will decide when you must stop and when to restart your treatment with Vildagliptin/Metformin.
A test to determine your liver function will be performed before the start of Vildagliptin/Metformin treatment, at three-month intervals for the first year and periodically thereafter. This is so that signs of increased liver enzymes can be detected as early as possible.
During treatment with Vildagliptin/Metformin, your doctor will check your kidney function at least once a year or more frequently if you are elderly and/or have worsening renal function.
Your doctor will test your blood and urine for sugar regularly.