Generic Monodox medication shares possible side effects with other similar drugs within the tetracycline group of antibiotics. Minor side effects may be manifested in the form of photosensitivity, loss of appetite, or nausea and vomiting. More serious complications that may be present include facial swelling, vision impairment, chest pain, diminished or dark urine, chills and fevers, throat irritation, vaginal discharges, unusual bruising, bloody bowel movements, and hives. If any of these symptoms appears, a patient should alert a local doctor as soon as possible.