Wheezal Febral Elixir is a homeopathic remedy that is said to help alleviate the symptoms of fever and headache. The ingredients are believed to work together to reduce inflammation and promote healing.It is used to treat fever and headaches. It was first developed in 1816 by Jean-Baptiste Guillaume Febre's French doctor. It is available in both oral and injectable forms. The oral form is usually taken as a tablet or drink, and it can be used to treat both fever and headache. The injectable form is usually used to treat fever only.