Definition: Non-inherence is a concept in the field of pharmacology, which refers to the inability or lack of efficacy of a drug when administered subcutaneously (subcutaneous) rather than intravenously (intravenous). In other words, it means that the effectiveness of a drug, such as an injection or a patch, may not be as pronounced as it would be if it were given intravenously. This can occur because the body's immune response to the drug is weaker when administered sub