[outofsalt]

“NOTE: It should be emphasized that FISH-CYCLINE [and other tetracycline antibiotics of various names] can become toxic after its expiration date, unlike most of the other medications listed.”

Does this apply to other, “Cyclines”? ie, Doxycycline

Does anyone have a rule of thumb guide to when/which different antibiotics are preferred?

Has anyone bought these outside of the US and brought them in?

[Kartographer]

My understanding is that all ‘cyclines’ have a shelf life.

DOXYCYCLINE CAPSULES BP 100mg

Looks to be 4 years.

http://www.medicines.org.uk/emc/medicine/23950/spc

[riri]

Has anyone bought these outside of the US and brought them in?

I used to go down to Mexico once a year and fill my stock. I haven't been in about four years though.

[Sarajevo]

Does this apply to other, “Cyclines”? ie, Doxycycline

Yes. Tetracyclines can become nephrotoxic after their expiration date.

Does anyone have a rule of thumb guide to when/which different antibiotics are preferred?

Ampicillin/Augmentin/Amoxicillin for Upper respiratory infections.
Keflex for skin/skin structure and bone infections.
Tetracycline for Chlamydia, Mycoplasma, Rickettsia, spirochetal infections, and brucelosis.
Cipro for lower respiratory infections, anthrax, complicated infections.
Metronadizole for anerobic bacterial infections, amebic and giardia lamblia infections.

Just off the top of my head.....