There is no difference between mecobalamin and methylcobalamin, they refer to the same drug, mecobalamin is the trade name and methylcobalamin is the chemical name. Micobal includes two preparations, one is a methylcobalamin tablet and the other is an injectable preparation of methylcobalamin. Methylcobalamin is a methyl derivative of vitamin B12, which has basically the same effects as vitamin B12 but is more effective and is mainly used to treat peripheral nerve diseases. B vitamins are involved in the synthesis of myelin sheath, and proper supplementation after nerve injury can provide raw materials for myelin synthesis, which can help promote nerve repair, shorten the course of the disease and enable patients to recover as soon as possible.