Your sugar levels are uncontrolled and this is the reason for your weakness,although you are taking generous dose of methyl cobalamine and B complex vitamins in MEAXXON PLUS and Bplex forte.
You must consult a diabetologist
and get either some sulfonylurea
urea like GLIMMIPRIDE or some newer anti diabetics like GLIPTINS.
It is not possible to keep your sugar levels controlled with just GLYCOMET
Must increase the dose of cardace and see to it that your blood pressure is below 120/80 mm of Hg.
You must also get your lipid profile
done as dyslipidemia
is very common in diabetics and is responsible for macro vascular complications.
In case of deranged lipid profile,statins must be added in the medications.
You must try to bring your fasting levels to below 130 and PP levels to around 160 to 170 ,at least.
Rest of medicines are all right and keep doing regular exercises and observe proper dietary restrictions and precautions.
You must talk to a diabetologist for the proper guide lines.