Complex sentence: It was between then, and 1943 that 6-MAM started being used for recreation, the effects of unsanitary intradermal, intramuscular, and intravenous use to make its way into American medical literature in 1943, with Wound Botulism being related to these methods.
Split into simpler sentences: It was between then and 1943 that 6-MAM started being used for recreation. The effects of unsanitary intradermal, intramuscular, and intravenous use made their way into American medical literature in 1943, with Wound Botulism being related to these methods.