i take metformin also 3 tablets daily they wernt agreeing with me at first till i started eating a lil then taking it not sure if u have tried that yet but works for me .
Gliclazide? Did you mean to say Glipizide? When writing names of medications it is important to spell them correctly as printed on the bottle/vile/container.
Medication adjustments and/or changes only can be answered by your attending physician as he/she has access to your medical records/history to provide the correct evaluation, not strangers on Internet public health forums.
Good luck -