SECTION 1. Every preparation, whether of a simple substance or of compounded substances, for the prevention, alleviation, or cure of human ailments, whether issued in or for retail sale, shall be accompanied by the formula of preparation plainly and legibly expressed upon the bottle, label, or package immediately containing the preparation, in such wise that it shall reach the purchaser at each and every purchase. The formula shall be accurately stated, qualitatively and quantitatively in the language, descriptions, and abbreviations used in the United States Pharmacopoeia or other accepted pharmacopoeias or formularies. If any nonofficial drug or substance be used in the preparation, it shall be plainly described under its ordinary name or customary chemical term, and not by any fancy or proprietary name.
The provisions of this section shall not apply to prescriptions representing the private formulas of legally qualified physicians practicing in the Philippine Islands.