Hello! Welcome on Healthcaremagic! You should know that Shelcal-CT is a drug containing calcium and vitamin D supplements. It is really helpful in case of osteoporosis or vitamin D deficiency. But, I don t think that the tingling in her right thigh is related to such disorder. As she suffers from diabetes, it is very likely that her symptoms are caused by a peripheral nerve damage, probably a mononeuropathy or a pinched nerve. For this reason, I would recommend performing a nerve conduction study. If the diagnosis is confirmed, I would advice starting treatment with gabapentine or pregabaline, to help improve her situation. Hope you will find this answer helpful! Best wishes, Dr. Aida