Like all medicines, Januvia may cause side effects, although not everybody gets them.
Very common side effects (more than 1 per 10 patients)
Common side effects (less than 1 per 10 but more than 1 per 100 patients)
Uncommon side effects (less than 1 per 100 but more than 1 per 1,000 patients)
Some patients have experienced the following side effects after adding sitagliptin to metformin: Common: nausea
Uncommon: weight loss, loss of appetite, abdominal pain, diarrhoea, low blood sugar, drowsiness.
Some patients have experienced stomach discomfort when starting the combination of sitagliptin and metformin together.
Some patients have experienced the following side effects while taking Januvia in combination with a sulphonylurea:
Common: low blood sugar
Some patients have experienced the following side effects while taking Januvia in combination with a sulphonylurea and metformin:
Very common: low blood sugar
Common: constipation
Some patients have experienced the following side effects while taking Januvia and pioglitazone: Common: low blood sugar and flatulence. In addition, some patients have reported foot swelling while taking Januvia and pioglitazone. These side effects may be seen with sitagliptin and any glitazone (e.g., rosiglitazone).
Some patients have experienced the following side effects while taking Januvia in combination with rosiglitazone and metformin:
Common: headache, cough, diarrhoea, vomiting, low blood sugar, fungal skin infection, upper respiratory infection, swelling of the hands or legs.
Some patients have experienced the following side effects while taking Januvia in combination with insulin (with or without metformin):
Common: headache, low blood sugar and flu
Uncommon: dry mouth, constipation
Some patients have experienced the following side effects while taking Januvia alone: Common: low blood sugar, headache
Uncommon: dizziness, constipation
In addition, some patients have reported the following side effects while taking Januvia:
Common: upper respiratory infection, stuffy or runny nose and sore throat, osteoarthritis, arm or leg pain.
During post-approval use of Januvia by itself and/or with other diabetes medicines additional side effects have also been reported (frequency not known): allergic reactions, which may be serious, including rash, hives, and swelling of the face, lips, tongue, and throat that may cause difficulty in breathing or swallowing. If you have an allergic reaction, stop taking Januvia and call your doctor right away. Your doctor may prescribe a medicine to treat your allergic reaction and a different medicine for your diabetes. Other side effects that have been reported include: inflammation of the pancreas; kidney problems (sometimes requiring dialysis); vomiting.
If any of the side effects gets serious, or if you notice any side effects not listed in this leaflet, please tell your doctor or pharmacist.