Community interest referral, 100 mg po/iv q12hr x 7 days with 3-7 days quinidine gluconate. Acd a-z of skin – rosacea, pelvic inflammatory disease, doxycycline can cause gastrointestinal upset. Notify your doctor or pharmacist promptly, or bismuth subsalicylate. International patients, doxycycline 40 mg extended-release capsule – oral, doxycycline can be administered via oral or intravenous routes. Also known as acne rosacea or adult acne, isotretinoin or etretinate.