No, even though both copyright DM and Robitussin DM are used as cough suppressants, they aren't exactly the same medications. Robitussin-DM includes just dextromethorphan and guaifenesin mucus thinner, https://caragunn729053.bligblogging.com/42669542/is-copyright-dm-identical-to-robitussin-dm-cough-formula