How to remove the bitter taste of quinine can be found in the book "Sulphur Bitters".

The book "Medical consultation book, a pharmacological and clinical book of reference" was written by G. P. Hachenberg.The medical consultation book is also available on Amazon.

Syrupi aurantii corticis...ad vj mix the acid and spirit of ether in a bottle; then add the soda, and afterwards the water gradually until effervescence ceases.Naphey.

Rub the surface several times a day.Ibid.

Two cups of water every two hours.Ibid.