Both medicines have broad-spectrum activity against ... decrease the time doxycycline stays in the body. Using antibiotics when you don't need them can contribute to antibiotic resistance.

diff infections can be deadly, and they are often acquired by hospitalized patients taking broad-spectrum antibiotics ... high-risk patients when the antibiotic doxycycline was used instead ...

A new Yale study examined sarecycline, a third-generation tetracycline derivative with a narrow-spectrum activity ... or doxycycline. But in 2018, the FDA approved a new antibiotic called ...