Metformin
Uses
Metformin is used in the treatment of type 2 diabetes.
How it Works
Metformin helps in allowing the body to make full use of the reduced amount of Insulin that occurs in type 2 diabetes patients. Insulin occurs naturally in the body's pancreas which helps to control the level of glucose(Sugars) in your blood, insufficient or inaffective insulin results in the condition called diabetes mellitus. Metformin helps in treatment of the type 2 diabetes.
Common Side effects
Patients who take Metformin may suffer from such side effects; Headache,
Bloating,
Flushing,
Changes in the nails,
Altered taste,
Abdominal pain,
Diarrhoea,
Loss of appetite,
A metallic taste in the mouth,
Nausea,
Vomiting
Bloating,
Flushing,
Changes in the nails,
Altered taste,
Abdominal pain,
Diarrhoea,
Loss of appetite,
A metallic taste in the mouth,
Nausea,
Vomiting
Pioglitazone
Uses
Pioglitazone is used in the treatment of type 2 diabetes mellitus.
How it Works
Pioglitazone works by increasing the sensitivity of your body's cells to insulin, it helps the body use Insulin more effectively, so more glucose is taken into cells for the same amount of insulin in the bloodstream. In type 2 diabetes the body produces insufficient amounts of insulin which causes the cells to build a resistance against the insulin(Insulin resistance). Pioglitazone directly helps in reducing this insulin resistance and helping in the treatment of type 2 diabetes.
Common Side effects
Patients who take Pioglitazone may suffer from such side effects;
Blurred vision,
Respiratory tract infection,
Bone fracture,
Numbness,
Putting on weight,
Aches and pains,
Flu-like symptoms,
Chest infections,
Reduced sense of touch (numbness),
A greater risk of broken bones
Glibenclamide 
Uses
Glibenclamide is used in the treatment of type 2 diabetes mellitus which is also known as non-insulin-dependent diabetes (NIDDM) or maturity onset diabetes.
How it Works
Glibenclamide works by increasing the amount of insulin released by the pancreas. Insulin helps to control the levels of Glucose (Sugar) in your blood. Glibenclamide works with the combination of regular exercise and diet control.
Common Side effects
Patients who take Glibenclamide may suffer from such side effects;
Weakness,
Trembling or shaking,
Sweating, light headedness,
Headache,
Indigestion,
Cramps,
Dizziness,
Lack of concentration,
Tearfulness,
Diarrhoea,
Constipation,
Feeling of fullness in the stomach,
Numbness around the lips and fingers,
Nausea,
Vomiting,
Loss of appetite,
Blurred or double vision,
Unusual weight gain