Neither incretin effect ( 409 % ( without DPP4 inhibitor ) vs 407 % ( with DPP4 inhibitor ) , P = 1.0 ) , glucagon responses ( 1395165 vs 1223195pmol/lmin , P = 0.41 ) , GIGD ( 524 vs 565 % , P = 0.40 ) nor gastric emptying ( Tmax for plasma paracetamol : 869 vs 8012min , P = 0.60 ) changed following DPP4 inhibition .