Rockstar has become the latest in a string of energy drink companies to add a hemp-infused beverage to their offerings, so consumers can chill out while they rage.

But soldiers beware, these drinks have a slim chance of causing you to pop positive on a drug test.

“A single use of some hemp products may result in a positive drug test result for THC,” Matt Leonard, Army spokesperson, told Military Times.

“[Regulation] AR 600-85 prohibits soldiers from using products made or derived from hemp, including CBD, regardless of the product’s claimed or actual THC concentration and whether such product may be lawfully bought, sold, or used in the civilian marketplace,” Leonard said.

Hemp plants contain more cannabidiol (CBD) than cannabis, which contains more tetrahydrocannabinol (THC). Although it’s unlikely, there’s no guarantee that hemp or CBD users will avoid showing positive for THC, which is what the Army tests.

“No test currently exists to identify the source of Tetrahydrocannabinol (THC) in a urine sample to determine if it was derived from illegal marijuana, or other products such as hemp energy drinks or Cannabidiol (CBD) infused products,” Leonard added.

“Hence, to protect the integrity of the Army’s drug testing program the only type of hemp products authorized within the Army Substance Abuse Program, Army Regulation (AR) 600-85 are those used as a durable good (eg. rope or clothing).”

So soldiers should avoid the hemp, unless you’re taking up twine-braiding or decide to go on a hippie handmade hemp clothing bender. But it seems easy enough to abstain. These drinks aren’t exactly designed to keep the average soldier awake on duty.

Rockstar Unplugged, which comes in three flavors — blueberry, passion fruit and raspberry cucumber — isn’t meant to keep an exhausted person alert.

“It’s a combination of herbals that can help us to relax, but not to sleep,” Fabiola Torres, PepsiCo general manager and chief marketing officer of its energy business told CNBC.