Vitamin B6 can be used for vomiting in pregnancy, radiation sickness and seborrheic dermatitis. Vitamin B12 is mainly used for symptoms of megaloblastic anemia or eye discomfort. Common dosage forms of vitamin B6 include injections, tablets, and ointments. Vitamin B6 injections and tablets are used for pregnancy, radiation sickness and vomiting caused by anticancer drugs. Vitamin B6 ointment is used for acne, seborrheic eczema, etc. Vitamin B₆ produces little or no toxicity with normal renal function, but prolonged, excessive application of this product can lead to severe peripheral neuritis, the development of neurosensory abnormalities, gait instability, numbness of the hands and feet. It is contraindicated for those who are allergic to any of the components in this product. Vitamin B12 is commonly used in doses of injections, tablets, and eye drops. Vitamin B12 injection is used as an adjunctive treatment for neuritis caused by megaloblastic anemia and subacute combined degenerative neurological lesions. Vitamin B12 Eye Drops are used for symptoms of eye discomfort such as eyestrain. Adverse reactions such as hypokalemia and hyperuricemia have been reported with the use of vitamin B12. Contraindications are unclear. Vitamin B6 and B12, applicable to different diseases, the role of the drug is also different, it is recommended to use under the guidance of a doctor, to avoid blind use of drugs to cause adverse consequences.