A select drug is sold under the name given the drug by the manufacturer these drug names are always spelled with a capital letter?

Drug names that are sold under a manufacturer’s brand name are typically capitalized (for example, a brand name like “Lipitor” uses an initial capital letter). Brand/generic labeling in the U.S. also follows a capitalization convention where the trade name is capitalized.

If you mean the exact question behind this sentence (for example, whether capitalization always distinguishes brand names from generic names), the rule of thumb is:

- Brand (trade) names are usually capitalized.
- Generic (nonproprietary) drug names are usually not capitalized.

If you share the full sentence or the exact drug name you’re looking at, I can explain whether it follows this convention and how it would be written on prescriptions and labels.