To spike a drink means to put alcohol or drugs into someone's drink without their knowledge or permission. Spiking also includes injecting someone with drugs without their knowledge or permission. A person’s drink can be spiked to make them more vulnerable for a variety of motives, including theft or sexual assault. Drink spiking is illegal. 

Different types of spiking can include the following substances being added to drinks: 
  • Alcohol 
  • ‘Date rape’ drugs 
  • Illegal drugs 
  • Prescription drugs (e.g. stimulants, tranquilisers, sedatives, opiates)