Hi, Nuromark contains methylcobalamin and pregabalin which is used to treat chronic neuropathic pain caused by DM, herpes zoster or spinal cord injury as well as both protect and healed nerve fibers. Side effects of nuromark are dizziness, sleepiness, confusion, weakness, dry mouth, depression, suicidal thoughts, mood swings, impaired balance, blurring of vision, loss of concentration, dry mouth, irritability, numbness, muscle cramps, drowsiness, loss of memory, vomiting, tremor, nausea, constipation, increased appetite, urinary incontinence etc. Balanced diet and exercising regularly may prevent weight gain. It is a habit forming medication, so the medication should be taken as long as the prescribing doctor s guideline. Absolute DM contains alpha lipoic acid, folic acid, vitamin B1, vitamin B6, methylcobalamin which is used to treat anaemia, nutritional deficiencies, diabetic neuropathy, peripheral neuropathy, anorexia etc. Side effects of absolute DM are nausea, vomiting, gastritis, nervousness, vertigo, abdominal pain, GIT upset, allergic reactions, headache, chest pain, involuntary movements, restlessness, coughing, sweating, headache, anorexia, breathing difficulties, irritability, confusion etc. Bio D3 plus is a combination of calcitriol and vitamin D3 which are useful for osteoporosis, hypocalcemia, hypoparathyroidism, secondary hyperparathyroidism, renal osteodystrophy, proper functioning of nerves, cells, muscles and bones in the body etc. Its side effects are nausea, vomiting, constipation, headache, rashes, abdominal pain, anorexia, dry mouth, dehydration, kidney stones, metallic taste etc. In case of experiencing any side effects, prescribing doctor should be informed. Take care. Hope I have answered your questions. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General And Family Physician,