Dear sir/madam 
i can understand your concern.
the medication onglyza is a type of DPP 4 inhibitor also called as 
saxagliptin.
Inhibitors of dipeptidyl peptidase IV (DPP-IV) represent a novel class of frequently used anti-diabetic drugs. In addition to its function in metabolic regulation, DPP-IV also plays a role in the immune system. Whether the DPP-IV inhibitors 
sitagliptin, vildagliptin or saxagliptin impair immune responses is, however, currently unknown. 
until now studies are done to check for key point of immune modulation which are encouraging 
 Furthermore, proliferation of T cells and suppressive function of regulatory T cells was preserved. in may animal experiments  crucial immunological parameters remain unaffected upon treatment with DPP-IV inhibitors, a fact that is reassuring with respect to safety of these drugs.
this drug is not associated with 
Dry eyes and hair loss.
this drug don't cause any 
weight loss or weight gain we can say ite weight neutral
regards