Methylcobalamin and vitamin B1 can be taken together. Methylcobalamin is actually vitamin B12, and both drugs have certain effects of protecting mucous membranes and improving nerve function, so methylcobalamin tablets and vitamin B1 taken together can be used to treat diseases such as diabetic peripheral neuropathy. Moreover, taking vitamin B1 can also effectively reduce some gastrointestinal discomfort symptoms, such as nausea and vomiting, when taking the drugs, and it can also help promote appetite, so it is more beneficial to use methylcobalamin tablets and vitamin B1 together. Both drugs belong to the B vitamin group. There are many kinds of B vitamins, which are very important to the human body and are essential for maintaining normal metabolism and physiological functions of the human body.