Premarin
- Information for US residents about Premarin, Prempro and Premphase hormone replacement therapy from Wyeth-Ayerst. Includes details about menopause, news, patient brochures, and prescribing and safety information.
- http://www.premarin.com/

Cenestin (Synthetic Conjugated Estrogens)
- Full prescribing information from RxList.
- http://www.rxlist.com/cgi/generic/cenestin.htm

DrugDigest: Conjugated Estrogens and Medroxyprogesterone
- Information on dosage, usage, side effects, and interactions. Sold under brand names such as Premphase and Prempro.
- http://www.drugdigest.org/DD/DVH/Uses/0,3915,173%7CPremphase,00.html

DrugDigest: Conjugated Estrogen
- Information on dosage, usage, side effects, interactions.
- http://www.drugdigest.org/DD/DVH/Uses/0,3915,243%7CConjugated%2BEstrogen,00.html

Conjugated Estrogens and Medroxyprogesterone
- Information from the RxList.
- http://www.rxlist.com/cgi/generic/cemp.htm

Premarin.org
- Features history of the drug, background of Wyeth-Ayerst, HRT information, and information about the controversy surrounding the mares used in the creation of the drug.
- http://premarin.org/

Conjugated Estrogens
- Information from the RxList.
- http://www.rxlist.com/cgi/generic/conest.htm