What are the only countries in the world that allow prescription drugs to be advertised directly to consumers?

Direct-to-consumer advertising (DTCA) refers to the marketing and advertising of pharmaceutical products directly to consumers as patients, as opposed to specifically targeting health professionals. The term is synonymous primarily with the advertising of prescription medicines via mass media platforms—most commonly on television and in magazines, but also via online platforms.

Direct-to-consumer advertising is only completely legal in New Zealand and the United States, but are subject to regulations regarding the balanced disclosure of a prescription's benefits in comparison to its risks (including but not limited to side effects and contraindications), among other factors.