My daughter (28) has been on Metformin for many years. Her legs always ache and she started taking calcium supplements. But is this a possible side effect of the drug?
The most common side effects of metformin are upset stomach, gas, diarrhea and occasionally, vomiting. These symptoms are usually temporary, however. More serious side effects are rash, itchiness, difficulty breathing and swelling of the lips or tongue (signs of an allergic reaction); also, chest pain, fever, muscle weakness or pain, irregular heart beat and drowsiness may occur. Taking metformin can also increase the risk of vitamin B12 deficiency, which, in some cases, may cause weakness in the legs. Your daughter’s leg pain may or may not be due to the metformin; she should make an appointment with her healthcare provider to determine the cause and discuss treatment options.