Dietary Supplement Regulation Moratorium Act of 1993 - Prohibits the Secretary of Health and Human Services from implementing the Nutrition Labeling and Education Act of 1990 or any amendment made by such Act earlier than April 15, 1994, with respect to dietary supplements of vitamins, minerals, herbs, amino acids, or other similar nutritional substances. Prohibits the Secretary from issuing any final regulations applicable to such substances before that date. Specifies that any such proposed regulations shall not be considered to be final regulations until that date. Makes the effective date for provisions dealing with State enforcement with respect to such substances April 30, 1994.