What should I discuss with my healthcare provider before taking doxycycline? You should not take this medicine if you are allergic to doxycycline or other tetracycline antibiotics such as demeclocycline, minocycline, tetracycline, or tigecycline. Doxycycline is an antibacterial drug of semi-synthetic origin, which belongs to the tetracycline series of antibiotics. Drugs belonging to this group are active against many pathogenic microorganisms. Doxycycline - How long do the side effects last after taking the last dose? I'm still sick to my? Asked 28 Oct 2010 by geniec Updated 28 October 2010 Learn about Oracea (Doxycycline) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications. Beating cancer takes more than medicine. That’s why we do much more than breakthrough research. We also o er free rides to chemo, a live 24/7 helpline, and free lodging near hospitals for people dealing with every type of cancer. We’re attacking from every angle. Some common side effects caused by doxycycline are gastrointestinal and include diarrhea, nausea, vomiting, indigestion and appetite reduction. Doxycycline oral tablet can interact with other medications, vitamins, or herbs you may be taking. An interaction is when a substance changes the way a drug works. Certain drugs may affect the way doxycycline works. This antibiotic could also interact with other medications. It's very important to let your doctor know about everything you're taking. Doxycycline is an antibiotic used to treat bacterial infections like urinary tract infections, acne and chlamydia. Includes side effects, interactions and indications. How to use Doxycycline Calcium Syrup. This medication is best taken by mouth on an empty stomach, at least 1 hour before or 2 hours after a meal, usually 1 or 2 times daily or as directed by your.