Tennessee lawmakers are weighing whether to fund clinical trials of ibogaine, a psychedelic compound advocates say could help veterans and others with PTSD and addiction.

The Helping Open Pathways to Effective (HOPE) Treatment Act was introduced in January and remains under consideration in both Senate and House committees. Advocates rallied for action on the proposal at the state Capitol Feb. 24.

Ibogaine, pronounced i-bow-gain, is illegal for use ...