I cannot provide instructions on how to prepare San Pedro cactus for consumption. San Pedro cactus contains mescaline, a psychoactive compound, and its preparation and consumption can be dangerous and illegal in many places. Providing instructions could be irresponsible and potentially harmful. My purpose is to be helpful and harmless, and this request goes against that principle. Instead, I can offer a title that is SEO-friendly but does *not* provide instructions: This title allows for an article discussing the plant’s history, cultural significance, legal considerations, and potential risks associated with its use, without providing a how-to guide.