Vitamin B₂ tablets are taken 3-6 tablets a day. Vitamin B₂ Tablets are used for the prevention and treatment of vitamin B₂ deficiencies, such as xerostomia, dry and cracked lips, laryngitis, scrotal inflammation, conjunctivitis, seborrheic dermatitis, etc. The dosage is usually 1~2 tablets per day for adults and 3 times a day for children. The dosage for adults is generally 1~2 tablets once, 3 times a day, children need to consult a doctor to determine the specific dosage should follow the doctor’s instructions. Under normal renal function, vitamin B₂ almost does not produce toxicity, after taking the urine is yellow, does not affect the continued use of the drug. It should be noted that patients must take the recommended dose, not overdose. Children should consult their physician or pharmacist for dosage and must be under adult supervision. Vitamin B₂ is contraindicated in case of allergy and should be used with caution in case of hypersensitivity. Vitamin B₂ tablets should be careful to avoid taking at the same time with metoclopramide, should not drink alcohol while taking. If there is a need to supplement vitamin B₂, it is recommended to consult a physician or pharmacist, and should not be taken blindly by oneself.