Displaying 5 results of Acitretin Stable Isotopes Acitretin is a synthetic retinoid molecule used to treat psoriasis. Acitretin stable isotopes are non-radioactive isotopes of acitretin that have a consistent and unchanging atomic weight. These isotopes are used in scientific research to study the metabolism, pharmacokinetics, and physiological effects of acitretin. They are also used in the development and testing of new drugs and treatments for psoriasis and other skin disorders.