Iowa Code Title IV. Public Health [Chs. 123-158] § 148.2. Persons not engaged in practice

1. Persons who advertise or sell patent or proprietary medicines.

2. Persons who advertise, sell, or prescribe natural mineral waters flowing from wells or springs.

3. Students of medicine and surgery or osteopathic medicine and surgery who have completed at least two years' study in a medical school or a college of osteopathic medicine and surgery, approved by the board, and who prescribe medicine under the supervision of a licensed physician and surgeon or licensed osteopathic physician and surgeon, or who render gratuitous service to persons in case of emergency.

4. Licensed podiatric physicians, chiropractors, physical therapists, nurses, dentists, optometrists, and pharmacists who are exclusively engaged in the practice of their respective professions.

5. Physicians and surgeons or osteopathic physicians and surgeons of the United States army, navy, air force, marines, public health service, or other uniformed service when acting in the line of duty in this state, and holding a current, active permanent license in good standing in another state, district, or territory of the United States, or physicians and surgeons or osteopathic physicians and surgeons licensed in another state, when incidentally called into this state in consultation with a physician and surgeon or osteopathic physician and surgeon licensed in this state.