Spiking is where someone ingests something without their knowledge or consent, and this alters their state of mind and (or) inhibitions. This could be done to make the victim more vulnerable to things including theft, sexual assault or it can be seen as an attempted joke.
Drink spiking is where something is added to your drink, usually either alcohol or drugs, without your knowledge and (or) consent. This is understood to be the most common form of spiking.
Previously there have been increased reports of people being injected with drugs across the UK, via needles, without their knowledge or consent (needle spiking). It’s believed that the same drugs are being used, as those used in drink spiking, as the symptoms are very similar.
Drink spiking is believed to be the most common, but there are potentially other types; for example, smoking a cigarette which has had drugs added to it.