Unclear question. I'm not sure what you are trying to treat. Sickle cell trait is not a disease and there are no medications currently approved to "treat" it. Do you have some other condition that you feel would be helped with intron a (interferon alfa 2b)?
Interferon. Intron a (interferon alfa 2b) is the trade name for interferon alpha. Not used as much as in the past, but still can be used for high risk melanoma, rarely for some myeloproliferative neoplasia situations and renal cell cancers. Most common use is in hepatitis c. Interferon is a natural substance made by lymphoid cells in response to viral and other illnesses.
Interferon alpha. Is a treatment for chronic hepatitis c and is also occasionally used in certain types of lymphoma and leukemia. It is a manufactured protein that is derived from a real human protein. There are some very significant side effects that include severe flu-like symptoms, depression, nausea, diarrhea, headaches.
Interferon alfa-2b. Interferon Alpha 2b, made from recombinant dna, used in the treament of several illnesses. A poor name -- an intron is defined to be a portion that is transcribed by messenger RNA but then the corresponding portion of messenger RNA is removed by RNA splicing before translation.
Interferon alpha. Is a treatment for chronic hepatitis c and is also occasionally used in certain types of lymphoma and leukemia.