Name Info Provider Link
Cold and Cough Medicines free resource MedlinePlus Health Information https://medlineplus.gov/coldandcoughmedicines.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=31096521.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31096521/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/31096521
free resource Wolters Kluwer https://doi.org/10.1097/MD.0000000000015711