The invention relates to a Liuwei Dihuang 
Pill, which is a famous ancient prescription 
medicine applied for about millennium, and is a well selling 
medicine for caring health and strengthening body which is pursued by lots of people and frequently taken for a long time; but 
Alisma orientale in the Liuwei Dihuang 
Pill can cause toxic symptoms such as gastroenteritis, 
nausea, emesis, dizzy symptom, giddiness, bellyache, laxness, limbs 
weakness, inappetence, pruritus, angioneurotic 
edema, allergic eruption, and even respiratory 
paralysis, etc. Ancient and recent medicinal literatures indicate that the 
Alisma orientale has the effects of dredging the water passage, purging the 
kidney-fire and causing dizziness, is unsuitable to be taken for long and overdosed, and serious side effects such as 
nephrotoxicity, acute tubular 
necrosis, etc., can be caused if the 
Alisma orientale is taken for a long time. 
Traditional Chinese medicine cortex lycii radicis is the root 
bark of medlar that is homology of 
medicine and food, and has the same effect of purging the 
kidney-fire with the 
Alisma orientale in the Liuwei Dihuang 
Pill. The invention uses the cortex lycii radicis to replace the 
Alisma orientale to be improved into a new Liuwei Dihuang Pill, thereby not only remaining the enriching yin and nourishing 
kidney function in Liuwei Dihuang Pill adopting ancient prescription, but also avoiding various side effects caused by using the 
Alisma orientale, and facilitating to further increase the medicine safety; the new Liuwei Dihuang Pill can acquire considerable number of market shares in the competition with the original Liuwei Dihuang Pill.