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(February 12, 2026) A disturbing claim is currently circulating on social media: K.O. drops are being spread on toilet paper and can be absorbed through the mucous membranes. But is there any truth to this?

According to this, K.O. drops are to be applied to toilet paper. When used, the substances could enter the body via the mucous membranes and take effect there.

According to experts, this scenario is not realistic under normal circumstances.

"Not normally. It takes several milliliters – which can hardly be absorbed through brief contact with dry toilet paper," explains Prof. Dr. Merja Neukamm, forensic toxicologist at the Institute of Forensic Medicine at the Medical Center – University of Freiburg.

The amount of the substance is crucial: several milliliters would be necessary to have a relevant effect. This amount can hardly enter the body through brief contact with dry toilet paper.

Furthermore, the Medical Center – University of Freiburg is not aware of any cases in which poisoning has occurred in this way.

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