Cereus Serpentaria To purchase Cereus Serpentaria and other homeopathic remedies online, please click the button above. Remedy info unavailable. Cereus Serpentaria is available to buy through our online shop from Boiron in USA, Boiron in Canada, Hylands in USA, Helios, Europe, by clicking the red 'View Purchase Options' button. Alternative names, keywords, and common mis-spellings Cereus Serpenticus