Is There a Maximum Dosage Allowable of Gliclazide / Sitagliptin?

[The Grey Panther]

My HbA1C level averages about 8% every day (70 mmol/mol). I take 4 x 80mg Gliclazide tablets and 1 x 100mg Sitagliptin tablet every day. I am told by my Nurse that this is the maximum dosage and cannot be increased.
However, even after changing my diet my HbA1C level shows no sign of going down.
Is there actually a maximum allowable dossage of Gliclazide / Sitagliptin? Or is there an alternative medicine?

 

[EllieM]

Looks like 320mg is the max dosage of gliclazide

Gliclazide | Healthify

Gliclazide is used to treat type 2 diabetes. Find out how to take it safely and possible side effects. Gliclazide is commonly called Glizide.

healthify.nz

and 100mg for sitagliptin

Sitagliptin 100 mg daily effect on DPP-4 inhibition and compound-specific glycemic improvement - PubMed

Across sitagliptin doses in this study, the similarity of the 24-h WMG concentrations and the similarity of the corrected DPP-4 inhibition values support prior findings that the maximal glucose-lowering efficacy of sitagliptin is achieved with once-daily dosing of 100 mg. Clinicaltrials.gov...

pubmed.ncbi.nlm.nih.gov

But there are other medications you can take...

 

[Rachox]

How have you changed your diet? It maybe that changes in your diet could help too.

 

[The Grey Panther]

I used to have Ovaltine / Horlicks but have cut them out. My intake of bread is minimal. Unfortunately, having an ileostomy means that I have to eat regularly and often in order to maintain my weight.

 

[MissMuffett]

What do you eat in a typical day? Could you reduce your carbs and find alternatives?

 

[The Grey Panther]

My diet is as low on carbohydrates as possible and hasn't changed much in the past 5 years. In that time the HbA1C has slowly crept up. Unfortunately, I need to eat regularly and often in order to keep my weight up, as I have an ileostomy.