Homeopathic Medicine. Sore throat hoarseness. All natural. No drug interactions. Roxalia combines homeopathic medicines traditionally used to treat sore throat and hoarseness. Homeopathic medicines are made of very dilute substances and are regulated as drugs by the FDA. Roxalia is made by Boiron, the world leader in homeopathy. For more than 65 years, Boiron has been committed to funding scientific research and educating the public and health care professionals about homeopathic medicines. The letters HPUS indicate that these ingredients are officially included in the Homeopathic Pharmacopeia of the United States. Non-drowsy, no drug interactions. Made in France by Boiron.