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.
Also, the word publisher can refer to the individual who leads a publishing company or an imprint or to a person who owns/heads a magazine. Traditionally, the term refers to the distribution of printed works such as books (the book trade) and newspapers.