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.
The possible causes of a persistent salty taste are dehydration, medications, salivary gland diseases and post-nasal drainage, according to the Mayo Clinic. Rare causes include endocrine disorder, nutritional deficiency and neurological disorder, such as migraine and epilepsy.