Prednisolone is an adrenocortical steroid used for multiple conditions including endocrine disorders, rheumatic disorders, collagen diseases, skin diseases, allergies, eye diseases, respiratory diseases, blood disorders, cancers, edematous states, gastrointestinal diseases, and nervous system disorders, among others. The brand name of this medication is discontinued, but generic versions may be available. Common side effects of prednisolone include infections, heartburn, trouble sleeping (insomnia), hunger, nausea, headache, dizziness, menstrual period changes, increased sweating, acne, and nervousness.
Family history is a risk factor for asthma, with many different genes being implicated.  If one identical twin is affected, the probability of the other having the disease is approximately 25%.  By the end of 2005, 25 genes had been associated with asthma in six or more separate populations, including GSTM1 , IL10 , CTLA-4 , SPINK5 , LTC4S , IL4R and ADAM33 , among others.  Many of these genes are related to the immune system or modulating inflammation. Even among this list of genes supported by highly replicated studies, results have not been consistent among all populations tested.  In 2006 over 100 genes were associated with asthma in one genetic association study alone;  more continue to be found.