Hello, don't take medicine for a long time Guhan Health-preserving Essence Oral Liquid has the functions of invigorating qi, tonifying kidney and replenishing essence, and can be used for dizziness, palpitation, dizziness, tinnitus, amnesia, insomnia and mental fatigue caused by deficiency of both qi and yin and insufficiency of kidney essence. Climacteric syndrome, physical weakness after illness, is proved by written evidence. The effect is quite good. The side effects are not great. In addition, when taking it, you should avoid spicy and greasy food, give priority to a light diet, eat more foods that tonify the kidney and nourish the yin, and exercise properly at ordinary times to enhance your physique.