Over-the-counter (OTC) drugs are medicines that may be sold to a customer without a prescription. In the United States, the manufacture and sale of OTC substances is regulated by the FDA. In Canada Allegra, Anusol-HC, Nicorette INH and Transderm Scop are over the counter.
There is a purchase limit for products containing pseudoephedrine such as Actifed, Allegra-D, Drixoral and Entex LA.
