Galvus met, till date claimed as a safe drug has become very popular due to its effectiveness. It is also known as a Gliptin or DPP4 inhibitors. From latest clinical trials , it is seen to have increased risk of heart failure as published in a very recent article in AHA journals of Feb 2018 issue.
Galvus met contains Vildagliptin which has not been approved by FDA, though its twin sister Sitagliptin has FDA approval.
Talk to your doctor if you need to reduce your dose of Galvus met or substitute by any other drugs.
In any case, try to control blood sugar by diet and exercise and minimise medication since most of the medicines seems to have some side effects or other.
Insulin seems to be safer than the oral medications.