When a patient ingests medicine, he or she is counting on its purity, uniformity, and potency to work exactly as promised. The presence of an impurity such as Thiamine EP Impurity H, if not monitored, has the potential to upset this equation. It may influence how the drug interacts with the body, alter its bioavailability, or even cause side effects. https://chemicea.com/blog-details/thiamine-ep-impurity-h-affect-drug-safety