National MS Society: Papaverine
- Information for patients about this vasodilator, which is used to treat erectile dysfunction in multiple sclerosis patients.
- http://www.nationalmssociety.org/%5CMeds-Papaverine.asp

MedlinePlus: Papaverine
- Brief summary for consumers in html format.
- http://www.nlm.nih.gov/medlineplus/druginfo/medmaster/a682707.html

Lycaeum: Papaverine
- Botanical information on this opium derivative, with links to photomicrograph and related substances.
- http://leda.lycaeum.org/?ID=400

Papaverine
- Full prescribing information from RxList.
- http://www.rxlist.com/cgi/generic/papaverine_ids.htm