An adult female has been prescribed doxycycline for a chlamydial infection. She is healthy and her only other medication is an oral combined contraceptive. Education would include:

She should use a back-up method of birth control (condom) until her next menses

Doxycycline may cause tendonitis and she should report any joint pain

Her partner will need treatment if her infection does not clear with the doxycycline

Doxycycline is used for a one-dose treatment of sexually transmitted infections (STIs); take the whole prescription at once