Kampo medicine for improving cognitive function in Alzheimer-type dementia or mild cognitive impairment and treating at least one disease from the group consisting of overactive bladder, constipation, and chronic kidney diseases complicated by them with one drug

A method for treating multimorbidity in a patient, comprising:

• administering to the patient one kampo combination drug consisting of a drug combination of:
• (i) orengedokuto, formulated from dried crude drugs Coptis Rhizome, Scutellaria Root, Phellodendron Bark, and Gardenia Fruit, wherein the mixed weights of the dried crude drugs in a daily dose for an adult are 1.5 g to 2.0 g for Coptis Rhizome, 3.0 g for Scutellaria Root, 1.5 g to 3.0 g for Phellodendron Bark, and 2.0 g to 3.0 g for Gardenia Fruit;
• and
• (ii) ryokeijutsukanto, formulated from dried crude drugs Poria Sclerotium, Atractylodes Lancea Rhizome or Atractylodes Rhizome, Cinnamon Bark, and Glycyrrhiza, wherein the mixed weights of the dried crude drugs in a daily dose for an adult are 4.0 g to 6.0 g for Poria Sclerotium, 2.0 g to 3.0 g for Atractylodes Lancea Rhizome or Atractylodes Rhizome, 3.0 g to 4.0 g for Cinnamon Bark, and 1.0 g to 2.0 g for Glycyrrhiza,
• wherein the one kampo combination drug relieves and treats at least one disease selected from the group consisting of:
• an overactive bladder, constipation, and chronic kidney disease.