Yes you can. Pseudoephedrine is an isomer of ephedrine . So there is surely a way to arrange the atoms in the ephedrine configuration . I am not sure how . Search it using your friendly search...
Ephedrine does all of the things cocaine does without the pesky illegality aspect attached to it; e.g. it's a stimulant, appetite suppressant, concentration aid, and decongestant (well, except for...
Treating allergy conditions, increasing blood pressure, strengthening heart contractions, treating Narcolepsy and Depression, and treating Myasthenia Gravis. It may also be used for other conditions...