Vibramycin is a brand name of the antibiotic doxycycline. Synonyms for this drug include doxycycline hyclate, doxycycline monohydrate, and tetracycline antibiotics. Vibramycin is effective in treating bacterial infections such as pneumonia, Lyme disease, and acne. It works by stopping the growth and spread of bacteria, preventing the infection from getting worse. Some common side effects of Vibramycin include nausea, diarrhea, and headache. If you experience severe side effects such as difficulty breathing or swelling of the face, seek medical attention immediately. It is important to follow your doctor's instructions and complete the full course of antibiotics to ensure the infection is fully treated.