glpamerica.

Glossary

503A

On this site, 503A records that a company's own pages describe the pharmacy filling its prescriptions with that label.

It appears in a review only where the company itself uses it. This site does not infer a pharmacy category from anything else on a site, and it never assigns one to a company that publishes none — a blank is a finding about the company's disclosures, not a finding about its pharmacy.

Every review runs the same American check for this, and the answer is printed on the review whether the company published it or not.

Why this word has a page

16 of the 39 reviews published on this site use it. A word gets an entry here at 5, measured against the reviews' own text every time the site builds — so this page cannot outlive the usage that justified it.

Every review that uses it

Each line is the sentence the word appears in, taken from our review of that company, with the full review a click away.

4 of the 16 reviews above use the word only inside a passage too long to quote here in one piece. We would rather link the review than cut a sentence out of the middle of a quotation.

The rest of the glossary

All 39 reviews are on the index, priced by molecule on the molecule pages. The rules every review follows are on how we review. Nothing on this page is medical advice — the disclaimer is here.

Kevin Turner · Reviews Editor · Checked August 2026