Wal-Mart Equate Tussin CF Adult Maximum Strength, Multi-Symptom Cold, (dextromethorphan HBr 10 mg, guaifenesin 200 mg, phenylephrine HCI 5 mg), 8 FL OZ (235 mL) (NDC 49035-229-08; UPC Code: 6-81131-03884-30), Distributed by: Wal-Mart Stores, Inc., Bentonville, AR 72712.
Presence of Precipitate; white substance confirmed as Guaifenesin, an active ingredient was observed in some bottles. If the product is shaken or warmed the white particles goes into the solution.
Nationwide
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=D-188-2013