. "These extracts were also used in veterinary medicine until the 1920s and longer. 2 For at least 3,000 years prior to 1842 widely varying marijuana extracts (bud, leaves, roots, etc.) were the most commonly used real medicines in the world for the majority of mankind's illnesses. 2 The U.S. Pharmacopoeia indicated cannabis should be used for treating such ailments as fatigue, fits of coughing, rheu" . . .