The soporiferous medicine
Note by H Craik to chapter 11 of Tale of a Tub

Compounded of sulphur and balm, is the sectarian preaching, compounded of pictures of the future sufferings of their opponents, and of the happiness in store for themselves. The pilgrims salve hints at the essential similarity between the Roman Catholic and the Sectary (cf. p. 151,1. 33 and P. 187 l. 10).