Final answer:
Antihistamines are often used to treat mild allergy symptoms and are effective against histamines. For type III hypersensitivity reactions, anti-inflammatory steroids are commonly used. Treatments like systemic corticosteroids and immunosuppressants are effective in managing autoimmune diseases by controlling the immune response.
Step-by-step explanation:
To determine which treatments are less likely to be effective, we need to consider the pathology in question. Without specific context, it can be challenging to provide a definitive answer. However, based on the information provided, we do know that antihistamines are effective in treating mild allergy symptoms by countering histamines, which reduce allergic responses such as itching and swelling. In contrast, for type III hypersensitivity reactions, which involve immune complex-mediated reactions, anti-inflammatory steroid treatments are common and effective.
In cases of systemic infections, oral administration is convenient for home administration of antimicrobials. For autoimmune diseases, where the immune system attacks the body's own tissues, treatments like systemic corticosteroids and immunosuppressants can be effective by inhibiting or modulating the immune response. On the other hand, corticosteroid creams, such as hydrocortisone, treat the symptoms, such as inflammation and itching, but not the underlying cause of conditions like rashes.