Amnesia can indeed be caused by specific drugs, with alcohol being a notable example. Severe alcoholism can lead to long-term amnesia due to malnutrition and vitamin deficiencies, particularly a lack of B vitamins, resulting in Korsakoff's Syndrome. This condition permanently impairs the ability to form new memories. Additionally, certain drugs, such as Vicodin, possess amnesic properties that inhibit the formation of new memories while under their influence, though they do not erase existing memories. The discussion also touched on the hypothetical idea of using amnesia to prevent conflicting information from accumulating in the brain, although this concept was met with skepticism.