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生素PP"。烟酸与烟酰胺都用于治疗糙皮病(维生素PP缺乏症),但因烟酸易于引起面部潮红、搔痒等副作用,而烟酰胺则无此副作用(因不扩张血管),故治疗糙皮病时多使用烟酰胺。烟酸还有较强的周围血管扩张作用,口服后数分钟即见效,可维持作用至1小时。对皮肤血管的扩张作用最明显,用药后常出现面部潮红、全身温热感、搔痒。临床上可用于治疗血管性偏头痛、头痛、脑动脉
Nicotinic acid and niacinamide are both used for the treatment of pellagra (vitamin PP deficiency), but nicotinic acid can easily cause facial flushing, itching and other side effects, while nicotinamide has no such side effects (due to non-dilation of blood vessels ), So the treatment of pellagra often use nicotinamide nicotinic acid also has strong peripheral vasodilator effect, a few minutes after oral administration, can maintain the role of 1 hour on the expansion of the role of the skin blood vessels most obvious after treatment Often appear facial flushing, warm body temperature, itching. Clinically available for the treatment of vascular migraine headache, cerebral artery