The best replacement for guaifenesin is pseudoephedrine.

The best alternatives to guaifenesin are rated as following:
★★★★★  pseudoephedrine
★★★★★  dextromethorphan
★★★★  promethazine
★★★★  phenylephrine
★★★  mucinex
★★★  carbocisteine
★★  guanfacine
★★  acetylcysteine
★  cheratussin
★  tussionex
★  robitussin
  bromhexine
  ambroxol

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

Other search terms related to guaifenesin and their ratings are:
★★★★★ codeine
★★ codeine syrup
★★ dxm
★★ dextromethorphan
★★ phenylephrine
★★ codeine cough syrup
★★ pseudoephedrine
★ ephedrine
★ hydrocodone
★ loratadine
sudafed
You have in mind a companion for guaifenesin and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of guaifenesin in all years. Click on graph for more.
guaifenesin
pseudoephedrine
dextromethorphan