Aminoglycoside
Antibiotics from this family can be used in patients who are not able to take some regular antibiotics, such as Penicillin because of allergies.  The most common Aminoglycosides used as alternatives to Penicillin are Erythromycin (lit. Red fungus) and Clarithromycin (lit. Yellow fungus).  They're most commonly used in the treatment of bacterial infections, such as Bronchitis.