Police have yet to receive complaints of cannabis being used in vape liquids, reported Sinar Harian.
However, Inspector-General of Police Tan Sri Khalid Abu Bakar said those found doing so would be charged under the Dangerous Drugs Act.
"If they (vapers) are found to be taking or ingesting drugs, appropriate legal action will be taken against them," he told reporters.
On Tuesday, the daily reported that some popular vape liquids were found to contain two types of cannabidiol, which are natural molecules found in cannabis.
The test by Universiti Sultan Zainal Abidin's East Coast Environment Research Institute also found traces of dronabinol, a synthetic substance found in marijuana.
Samples of the vape liquids being studied were bought from a seller in Shah Alam.