The invention relates to the technical field of
medicine, and discloses a leech preparation for improving
sleep disorder and a preparation method and application of the leech preparation. The leech extract is selected from one or more of leech, leech, leech,
whitmania pigra,
whitmania pigra,
hirudo nipponia, whitmania pinnata,
poecilobdella manillensis, whitmania lubrida and whitmania occulta; the preparation can be prepared into tablets, capsules, granules, injections, ointments, suppositories, aerosols, sprays or
traditional Chinese medicine preparations. The preparation method comprises the following steps: chopping leeches, soaking, performing
reflux extraction, concentrating an extracting solution into clear paste, further purifying through
alcohol precipitation, and mixing the purified extract with auxiliary materials to prepare a target
dosage form. According to the leech preparation, by adjusting
neurotransmitter balance, resisting
inflammation and oxidation and improving brain
microcirculation, the sleep latency can be remarkably shortened, the
sleep duration can be prolonged, and sleep disorders can be effectively improved.