B vitamins are better taken within half an hour after a meal, because gastrointestinal motility is accelerated after meals and digestion and absorption of substances are enhanced. B vitamins are best taken about half an hour after a meal, which facilitates the absorption of B vitamins and also reduces irritation of the gastrointestinal tract. You need to check the indications for the drug before taking it. Normal people can usually get enough B vitamins for their daily needs from food and do not need to take additional supplements. Vitamin B is a water-soluble vitamin, including vitamin B₁, vitamin B₂, vitamin B₆, and vitamin B₁₂. It should be taken in the recommended dosage under the supervision of a doctor. It is recommended that the patient should visit the hospital before the first dose of the medication and the doctor should recommend the dosage and duration of the treatment. Any discomfort after the administration of the drug should be attended to promptly.