Food and Drug Administration (Home Page)

• https://www.fda.gov/

FDA Center for Drug Evaluation and Research

• https://www.fda.gov/drugs

CDER Guidance Documents

• https://www.fda.gov/drugs

CDER Warning Letters

• https://www.fda.gov/cder/warn/

FDA Enforcement Actions

• https://www.fda.gov/oc/enforcement.html#Warning

Code of Federal Regulations (CFR)

• http://www.access.gpo.gov/cgi-bin/cfrassemble.cgi?title="200221

U.S. Pharmacopeia

• https://www.usp.org/

Regulatory Affairs Professionals Society (RAPS)

• https://www.raps.org/s_raps/alias.asp

English-Metric Conversions

• https://www.ibdprince.com/metric.shtml