On April 5, Ciera Smith sat in a car parked on the gravel driveway of the Rural Women's Recovery Program here with a choice to make: go to jail or enter treatment for her addiction.

Smith, 22, started abusing drugs when she was 18, enticed by the "good time" she and her friends found in smoking marijuana. She later turned to addictive painkillers, then anti-anxiety medications such as Xanax and eventually Suboxone, a narcotic often used to replace opioids when treating addiction.

Before stepping out of the car, she decided she needed one more high before treatment. She reached into her purse and then swallowed a handful of gabapentin pills.

Last December, Ohio’s Board of Pharmacy began reporting sales of gabapentin prescriptions in its regular monitoring of controlled substances. The drug, which is not an opioid nor designated a controlled substance by federal authorities, is used to treat nerve pain. But the board found that it was the most prescribed medication on its list that month, surpassing oxycodone by more than 9 million doses. In February, the Ohio Substance Abuse Monitoring Network issued an alert regarding increasing misuse across the state.

Gabapentin is approved by the Food and Drug Administration to treat epilepsy and pain related to nerve damage, called neuropathy. Also known by its brand name, Neurontin, the drug acts as a sedative. It is widely considered non-addictive and touted by the federal Centers for Disease Control and Prevention as an alternative intervention to opiates for chronic pain. Generally, doctors prescribe no more than 1,800 to 2,400 milligrams of gabapentin per day, according to information on the Mayo Clinic's website.

Gabapentin does not carry the same risk of lethal overdoses as opioids, but drug experts say the effects of using gabapentin for long periods of time or in very high quantities, particularly among sensitive populations like pregnant women, are not well-known.