Tara Reid was clearly slurring her words and seemed barely coherent when a concerned bystander called 911 after she claimed she was drugged in a Chicago-area hotel … and, we’ve got the audio for you to listen to.

The call — placed by someone who seems to work at the hotel because she refers to Tara as a “guest” — says Reid is “really inebriated” … and adding she can’t even hold herself up in a wheelchair.

The caller calls Tara “Ms. Reid” multiple times … saying it louder and louder, seemingly in an attempt to get her attention — and Tara responds with a series of groans and other mumbled noises instead of enunciated words.

Tara told us she went down to the hotel bar to have a quick drink … leaving it out while going for a quick smoke outside. When she returned, Tara said she found a napkin over the top of the drink that she didn’t put there — but she decided to drink it anyway. The next thing she knew, she was in a local hospital.

Reid insists she only had one drink on the evening she was taken to the hospital … and she filed a police report alleging she was drugged. Tara’s smoking buddy, a YouTuber named Sean P, told us he never saw her with a drink … though he admits he wasn’t paying much attention.

On Wednesday, Rosemont Police told us they’ve reviewed surveillance footage of the Rosemont, and — based on the videos — there’s no indication anyone spiked her drink. However, authorities are still waiting to get medical records from the hospital of any tests they might have run when she arrived.