Inositol, also called vitamin B-8, is a vitamin-like molecule that is used as a supplement to treat various conditions, according to WebMD. It is found naturally in plants and animals or made in a laboratory.
Specific conditions for which inositol supplementation may help include diabetic nerve pain, panic disorder, Alzheimer's disease, depression and schizophrenia. It may also help with attention deficit-hyperactivity disorder and autism, according to WebMD. In addition, it may be useful in treating polycystic ovarian syndrome as well as treating side effects of lithium use. Side effects of inositol include nausea, tiredness, headache and dizziness. There is some concern that inositol could worsen symptoms of bipolar disorder; however, there have not been sufficient studies as of 2015 to confirm this.