Manitimus is primarily used in the field of medicine, particularly as an immunosuppressive agent. It is commonly prescribed to prevent organ rejection in patients who have undergone organ transplants. By suppressing the immune system, it helps reduce the risk of the body attacking the transplanted organ. Additionally, Manitimus is sometimes utilized in the treatment of certain autoimmune diseases, where it helps to modulate the immune response and alleviate symptoms. Its application requires careful monitoring by healthcare professionals to balance its efficacy with potential side effects.