The cards don't contain ALL the meds in the pharmacology materials, but they do contain most of them. We tried to just include the most important ones, so that people wouldn't be overwhelmed. For example, there are dozens of chemo drugs, but we only included a few that we felt are most important for ATI, NCLEX, and HESI. Another example are the ADHD meds for kids. Our experience is that the standard exams only ask about a couple of them, so that is all we included. Even with leaving out less important meds, there are still a lot!