U.S. residents can obtain azithromycin (a.k.a., Zithromax, Z-Pak in
the U.S.) here without a prescription: look
for Zithromax 250 mg capsules.
UPDATE 3/23/2012 - as of this writing, the above web site is no
longer operational. If you find another reliable vendor,
please send me an e-mail.
UPDATE 2/13/2014 - The following site makes Indian market generic
Zithromax available for shipment to the U.S. (from India):
link to indianpharmaonline.com.
UPDATE 3/8/2015 - It has come to my attention that azithromycin is readily available
for use on animals, fish in particular. Supposedly, the active ingredient is the same
as for use on humans. If anyone has experience with this, either positive or negative, please email me.
An example web site selling azithromycin for fish is here:
link to pet products web site.