Unfortunately, the smell from a dead animal can take weeks and sometimes months to disappear. The problem with dead animals in a wall or somewhere in your house is that the dead tissue breaks down and the decaying tissue produces liquids that can seep into the wood in your walls and floor.
The following drugs, medications, substances or toxins may possibly cause Bitter tastes as a side effect. [ See detailed list of 23 drug side effect causes of Bitter tastes 1  ]. Sinemet. 2  Sinemet CR. 3  Lodosyn.
Among the causes of taste problems are: 1  Upper respiratory and middle ear infections. 2  Radiation therapy for cancers of the head and neck. 3  Exposure to certain chemicals, such as insecticides and some medications, including some common antibiotics and antihistamines.  Head injury.