By this is meant a peculiar temperament or disposition not common to
people generally. For example, some persons cannot take calomel in the
smallest dose without being salivated, or rhubarb without having
convulsions; others cannot take squills, opium, senna, &c.; and this
peculiarity is called the patient's idiosyncrasy, therefore it is
wrong to _insist_ upon their taking these medicines.