MedlinePlus: Tetracycline
- Features information about dosage, usage, warnings, and side effects.
- http://www.nlm.nih.gov/medlineplus/druginfo/medmaster/a682098.html

Tetracycline Hydrochloride
- Toxicology and carcinogenesis studies of tetracycline hydrochloride.
- http://ntp.niehs.nih.gov/index.cfm?objectid=07085276-B3E2-C702-7C6F26FAE2157677

DrugDigest: Tetracycline
- Information on dosage, usage, side effects, interactions, and drug comparisons including generics when available. Sold under brand names such as: Achromycin V, Panmycin, Robitet Robicaps, Sumycin, and Tetracap.
- http://www.drugdigest.org/DD/DVH/Uses/0,3915,646%7CTetracycline,00.html

HealthSquare:Tetracycline
- Information, precautions and interactions of the drug.
- http://www.healthsquare.com/pdrfg/pd/monos/tetracyc.htm

Tetracycline HCL
- Information from the RxList.
- http://www.rxlist.com/cgi/generic/tetcycl.htm