The Iowa Senate passed a bill Thursday that would allow a limited use of medical marijuana in the state.
The bill passed with a vote of 36 to 12. It would allow parents to obtain a state-issued identification card to possess and use the oil without the fear of prosecution.
The oil, which contains low amounts of THC, can be used to treat children who suffer from seizures.
Supporters say the bill offers a new form of treatment without the risk of abuse by others.
The bill now goes to the House for consideration.