GI upset and erosive esophagitis
Some anticonvulsants can decrease doxycycline levels
Increased digoxin levels
Increased INR with warfarin
Di- & Trivalent cations including Al, Ca, Fe, Mg (antacids, dairy products, iron supplements, some enteral feeds) - decreased absorption.
Antimicrobial class: Tetracycline
Pregnancy category: D