A Brooklyn infant died Thursday after his aunt served him over-the-counter cough medicine, police said.

According to authorities, 4-month-old Daniel Richardson stopped breathing moments after consuming the cough syrup at the family's Greene Ave. home in Bushwick.

Responding EMS workers discovered the infant unconscious. The child was transported to Woodhull Hospital where he was later pronounced dead.

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Police are still investigating the incident which is believed to be an accident. An autopsy will determined the cause of death.

The child's aunt, Patricia Richardson was interviewed by investigators but was not criminally charged.

Medical professionals typically urge parents not to give over-the-counter cold medicine to children younger than two without seeking professional advice first, due to possible adverse reactions.