Johna Martinez-Meth, 46, pleaded guilty to the involuntary manslaughter of 46-year-old Adrian Sepulva, who died in May, 2018

A California woman bearing the now ironic name Meth has been sentenced after she smuggled methamphetamine into a state prison inmate.

Johna Martinez-Meth, 46, pleaded guilty to the involuntary manslaughter of 46-year-old Adrian Sepulva, who died at the California Medical Facility in Vacaville, on May 18, 2018.

According to the California Department of Corrections and Rehabilitation, (CDCR) Sepulva had been serving a life sentence at the institution since 1997, on charges of second-degree murder.

Martinez-Meth visited Sepulva shortly before his death, the CDCR say.

An autopsy revealed the lifer had swallowed 'multiple balloons filled with methamphetamine'.

Following the execution of a search warrant, Martinez-Meth's home was searched by police in August, where they found balloons, glue and methamphetamine.

Martinez-Meth visited Sepulva at the California Medical Facility in Vacaville (pictured) shortly before his death in May, 2018

An autopsy revealed he'd swallowed 'multiple' balloons filled with methamphetamine (shown in a file photo above)

She was immediately taken into custody, and, following a guilty plea, Martinez-Meth was sentenced to two years in prison.

Drug abuse and drug smuggling is an on-going issue at prisons in California.

Suspected overdoses killed two inmates at San Quentin State Prison in December, after opioids were smuggled into death row.

Last year, 35 confirmed drug overdose deaths were confirmed across the state. That number has doubled since 2015.

'CDCR is committed to stopping the flow of drugs into our prisons,' said Bryan Shill, deputy chief of CDCR’s Office of Correctional Safety.

'Our investigators will diligently pursue those who smuggle narcotics into any state correctional facility, and we will seek justice through aggressive prosecution of violators.'