Some people are allergic to cephalosporins. Sulfa Drugs Sulfa drugs are the oldest antibiotics available and are also among the best. Sulfa was first used in 1930's. These drugs are used to treat a variety of infections including urinary tract infections, upper respiratory infections, and pneumonia. Sulfa-Resistant Bacteria Bacterial resistance to sulfa drugs is common.
Some people are allergic to sulfa drugs.
Tetracyclines Tetracyclines are antibiotics often used to treat penicillin-resistant infections. Tetracyclines are often used to treat gonorrhea, chlamydia , lime disease, rocky mountain spotted fever, and pneumonia. Tetracyline antibiotics include doxycycline, tetracycline, and minocycline. These compounds are antimicrobial because of their inhibition of bacterial protein synthesis. They bind to the cellular organelles called ribosomes , and interfere with the assembly of baterial amino acids into proteins .