During a routine audit on Monday, the pill bottles were found to contain similar-looking over-the-counter medications instead, according to a letter to families shared with KPRC 2’s Bryce Newberry. The district confirmed Thursday that the nurse has been terminated.

A medication mix-up at a Klein ISD elementary school has raised serious questions after a mother tells KPRC 2 her twin boys’ prescription ADHD medication disappeared just days after she delivered a fresh, 30-day supply.

More U.S. adults are being diagnosed with ADHD.

Prescription stimulants are used to treat ADHD, binge eating disorders, and narcolepsy. However, a shortage of these prescriptions is frustrating patients and their families.

Raines showed KPRC 2 with the security video from inside her home on Tuesday. In the video, one of the deliverymen seems to notices the medication sitting on the back of Raines’ kitchen sink. In a statement to KPRC 2, the company said the delivery men were from a third-party vendor. “The delivery company has confirmed to us that it has terminated its relationship with this delivery team, so they will no longer be serving rooms To Go customers. Her son’s medication cost about $750 and Raines says the company indicated they would likely compensate her for the stolen medication.

Previous studies had found the diagnosis was far more likely in white kids. In past studies that found higher rates of ADHD diagnoses in white kids, researchers hypothesized there were racial differences in access to health professionals or perhaps racial differences in attitudes that make white parents more likely to seek an ADHD diagnosis than black parents. About 17% of black children had ever been diagnosed, compared with about 15% of white kids and about 12% of Hispanic kids, the report found. But there are good reasons why ADHD may be as or more common in black kids, he said. ADHD has been called the most commonly diagnosed mental health disorder in U.S. children, with more than 6 million kids diagnosed.