Some of the most common ESTRING side effects include: Abdominal pain, Arthritis, Back pain, Vaginitis, Headache, Insomnia, Nausea, Skeletal pain, Vaginal discomfort, Vaginal hemorrhage Speak with your doctor for a full list of side effects and warnings related to ESTRING. Dr. Sheehy (BSc Molecular Biology, PharmD) works a clinical pharmacist specializing in cardiology, oncology, and ambulatory care. He’s a board-certified pharmacotherapy specialist (BCPS), and his experience working one-on-one with patients to fine tune their medication and therapy plans for optimal results makes him a valuable subject matter expert for our pharmacy.Read More....