It looks like your message is incomplete, so I can’t tell what “it” refers to.
But if you’re asking generally whether metformin causes side effects, here are the main ones in detail:
Common side effects:
- Stomach upset (very common): nausea, vomiting, abdominal cramps
- Diarrhea (most common reason people stop it at first)
- Loss of appetite
- Metallic taste in mouth
Less common but important:
- Vitamin B12 deficiency (can happen with long-term use → fatigue, tingling in hands/feet)
- Mild weight loss (usually mild and sometimes desired)
Rare but serious:
- Lactic acidosis (very rare but dangerous; risk higher in kidney disease, severe illness, or dehydration)
If you tell me what symptom or condition you meant by “it” (for example: weight gain, sexual function, kidneys, liver, etc.), I’ll explain specifically whether metformin causes it or not.
