Anyone want to try this cure for a sore throat?

Pity the poor soul who tries this cure:

So dogs' turd, when it 's dried, becomes
A medicine for ulcered gums ;
And of all powders is the best
For a sore throat. Probatum est.

British Wonders, p. 16. 171 7.

(Probatum est is Latin for 'has been proved'.)