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.
Can be non-fiction or fiction. MAGAZINE A popular work published periodically (weekly, monthly etc.) focusing on a specific interest or subject. MAGAZINE. A popular work published periodically (weekly, monthly etc.) focusing on a specific interest or subject. NEWSPAPER A periodical publication containing current events, news.