University of Pretoria pharmacology professor, Duncan Cromarty, told Africa Check that the myth ice will sink in a spiked drink is untrue.
However, there are sometimes some tell-tale signs. There’s no foolproof way to see if your drink has another substance in it, and you shouldn’t use these methods to rule out a spiking. The reason these are so regularly used is because they don’t produce a taste or smell, making it hard for the victim to know they’ve been spiked until it’s too late. The most common illegal drugs used to spike drinks are GHB, ketamine, and benzodiazepines such as valium and rohypnol.
Can you tell if your drink has been spiked? However, if you want to know the signs of a drugged drink, here’s what to look for.