Salts and crystals of 1-cyclopropylmethyl-4-[2-(3,3,5,5-tetramethylcyclohexyl)phenyl]piperazine have excellent cell adhesion inhibitoryaction and cell infiltration inhibitory action, and are useful as therapeuticorprophylactic agents for various inflammatory diseases and autoimmune diseasesassociated with adhesion and infiltration of leukocytes, such as inflammatorybowel disease (particularly ulcerative colitis or Crohn's disease), irritablebowelsyndrome, rheumatoid arthritis, psoriasis, multiple sclerosis, asthma andatopicdermatitis.
