Lithium is used for the treatment of bipolar disorder. Specifically, it is approved to treat manic episodes (but not depressive episodes). It is also approved as a maintenance treatment, which is a long-term treatment to help prevent episodes of mania or depression. Lithium has not been approved for treating bipolar disorder in children under 12 years old. Occasionally, lithium is also used  off-label  for treating other conditions.
A poison ivy rash itself isn't contagious â blister fluid doesn't contain urushiol and won't spread the rash. And you can't get poison ivy from another person unless you've touched urushiol that's still on that person or his or her clothing. 1  Symptoms. 2  Risk factors.
The rash that you get from poison ivy is caused by a chemical in the sap called urushiol. This chemical penetrates the outer layer of skin until it hits the dermis, and in the dermis an allergic reaction to the urushiol occurs. Not all people get poison ivy.