The phrase "most iatrical" refers to something that is highly medical or has a strong connection to the medical field. Synonyms for this phrase could include things like "medical", "clinical", "health-related", or "therapeutic". Some related phrases might include "physician-recommended" or "prescription-strength", as these also imply a strong connection to the medical profession or to medical treatment. Whether you are describing a product, a service, or a particular field of study, using these synonyms can help you emphasize the important role that medicine and healthcare play in our lives.