This contains 32 per cent, of cantharides.

Ceratum cantharidis may be used for the purpose of vesication, but the blistering plasters commonly put up by manufacturers have a slightly different base. When cantharides is applied for the purpose of vesication a blister will usually be formed in the course of six hours. Vesication can sometimes be hastened by removing the cantharides plaster after a few hours and. applying hot poultices. Blisters should not be applied directly over an inflamed part.

The following application has been suggested for baldness:

R Tr. cantharid............         83ij

Tr. capsici ..............         1 m xv

Alcoholis ................       45 oz jss

Aq. ros................ad     150 oz v

M.