Adherence to (compliance with) drug treatment is important. However, only about half the people who leave a doctor's office with a prescription take the drug as directed. Among the many reasons people give for not adhering to drug treatment, forgetfulness is the most common.
Definition of periodical. 1  1 : periodic 1. 2  2a : published with a fixed interval between the issues or numbersb : published in, characteristic of, or connected with a periodical.
A newspaper of general circulationâ is a newspaper that is: 1  issued at least once a week (daily newspapers are included in this description); 2  intended for general distribution and circulation; and. 3  sold at fixed prices per copy per week, per month or per year, to subscribers and readers without regard to business, trade, profession or class.