Quote Originally Posted by Purge
whats the best brand of cough syrup to use?
Anything with only DXM as the active ingredient, here are a few.

Benylin Adult Formula Cough Suppressant
Benylin Pediatric Cough Suppressant
Buckley's Mixture [DM]
CVS Tussin Maximum Strength Cough
DexAlone
Drixoral Cough Liquid Caps
Robitussin Pediatric Cough Suppressant
Robitussin Maximum Strength Cough Suppressant <--- I use this one.
Robitussin Honey Cough
Robitussin Maxiumum Strength Cough
Sucrets 4-Hour Cough Suppressant
Sucrets 8-Hour Cough Suppressant
Vicks 44 Cough / Dry Hacking Cough

http://www.erowid.org/chemicals/dxm/dxm_info2.shtml