Glycomet 500 and metsmall 500 are different brand names for same medicine I.e. METFORMIN.
Dizziness weakness could be due to hypoglycemia.
Normally metformin do not cause hypoglycemia except in rare cases.
After stopping night dose of metformin you should check fasting
sugar after a week or 2.
There is slight chance that fasting may rise again and may require to start small dose again.
Keep an eye on it
Next Steps
Consult Diabetologist SOS
Health Tips
Reducing simple carbs like rice at dinner or few minutes walk after dinner may help in case fasting is high.