Rifamycins: Rifampin and Rifabutin
– Mycobacteria
– Rfabutin is particularly active against
Myocbacterium avium
– Inhibit bacterial RNA synthesis
– Resistance appears more likely to develop with monotherapy
– Reddish-brown hue to the urine, saliva, tears, and other bodily fluids.
– Gastrointestinal upset
– Rash
– Headache