It seems you have gotten these names from your father over a telephone? Are you sure about the names? If the name were 'Zomet' and not 'Summet', then very much, Yes, that your father received correct medication as a replacement as keeping all brands of generic drug Metformin
is not possible for the medical stores- there being lots of different brands.
The side effect of Glycomet
are mainly gastric irritation and if the patient has chronic kidney disease
, cardiac problem or respiratory disease whereby his condition will be worsened by metformin by increasing lactic acid in the body, then it is contraindicated. So make sure your father undergoes yearly routine tests to rule out these conditions- especially the kidney condition as might be more symptomless. Other than that metformin is a very good drug for patients with type 2 diabetes mellitus
. Hope this helps! Good luck.