21 CFR §209.10

1. (a)Content. The side effects statement provided with each prescription drug product approved under section 505 of the act must read: “Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.”
2. (b)Format. The side effects statement must be in a single, clear, easy-to-read type style. The letter height or type size used for the side effects statement in accordance with paragraphs (b)(1) and (b)(2) of § 209.11 must be no smaller than 6 points (1 point = 0.0138 inch). The letter height or type size for the side effects statement under paragraphs (b)(3), (b)(4), and (b)(5) of § 209.11 must be no smaller than 10 points.