This baby macaque went ape over a tourist’s coffee — then passed out from the caffeine overload.

The mischievous 6-month-old monkey grabbed the brew from an unattended plastic bag hung from the tourist’s motorbike in Bangkok’s Bang Khun Thien district Sunday, the Nation/Asia News Network reported.

After downing the coffee, the monkey hopped off the bike and collapsed from a caffeine overdose, the Mirror reported.

Other tourists called for help for the poor fella, who was rushed to the Doctor Raiwin Pet Hospital for treatment with a mixture of carbon and saline, according to the Nation/Asia News Network.

Once vets had determined that the macaque had recovered, they released him to the care of his troop — under the close watch of a warden.

Caretakers warned the public to avoid leaving food and drinks in area frequented by the curious creatures, according to the report.

The “Khon Rak Ling Hua Jai Kraeng” community page on Facebook first reported the incident.