If your drink has been spiked it is unlikely it will look, smell, or taste any different. Most drugs take effect within 15-30 minutes and symptoms will usually last for several hours. The effects of spiking vary depending on what you’ve been spiked with. Your symptoms could include:
  • Lowered inhibitions
  • Loss of balance
  • Visual problems
  • Confusion
  • Nausea
  • Vomiting
  • Unconsciousness
  • Feeling dizzy, faint, or sleepy
Ref. https://www.yourunion.net/support/safety/spiking/

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