The best replacement for tonic is phasic.

The best alternatives to tonic are rated as following:
★★★★★  phasic
★★★★  soda water
★★★★  club soda
★★★★  soda
★★★★  clonic
★★  phasic receptors
★★  dominant
★  seltzer
★  phasic contraction
★  sparkling water
★  soda less calories
  vodka soda
  gin and tonic
  geritol complete
  myoclonic
  phasic rem
  geritol
  diet tonic
  keynote
  seltzer water
  soda better

Your alternative for tonic is not listed? Suggest!
Speaking about tonic, one probably shouldn't forget about gin.

Other search terms related to tonic and their ratings are:
★★★★★ gin
★★★ bitters
★ tonic
You have in mind a companion for tonic and it is not yet here? Propose!



Google Trends

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tonic
phasic
soda water