SIDE EFFECTS: Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if any of these unlikely but serious side effects occur: new or increased burning/itching/discomfort in the vaginal area. Tell your doctor right away if any of these rare but serious side effects occur: unusual tiredness, dark urine, easy bruising/bleeding. A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before using sulfanilamide, tell your doctor or pharmacist if you are allergic to it; or to other sulfa drugs (such as sulfamethoxazole); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: diabetes, immune system problems (such as HIV infection), 4 or more vaginal yeast infections a year, blood disorders (such as anemia), certain metabolic disorders (G6PD deficiency, porphyria). Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Ask your doctor whether you can have sexual intercourse while using this product. This product may weaken rubber products (such as latex condoms, diaphragms, cervical caps) and lead to failure. This can result in pregnancy. Therefore, do not use these products during treatment with this medication. Consult your doctor about other forms of barrier protection/birth control (such as polyurethane condoms) during this time. During pregnancy, this medication should be used only when clearly needed. If you are pregnant, follow your doctor's instructions on how to use the applicator to insert this medication. This medication should not be used near the expected delivery date because of possible harm to the unborn baby. Discuss the risks and benefits with your doctor. This medication passes into breast milk but is unlikely to harm a healthy nursing infant. However, ill or premature infants may be at higher risk for undesirable effects. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: The effects of some drugs can change if you take other drugs or herbal products at the same time. This can increase your risk for serious side effects or may cause your medications not to work correctly. These drug interactions are possible, but do not always occur. Your doctor or pharmacist can often prevent or manage interactions by changing how you use your medications or by close monitoring. To help your doctor and pharmacist give you the best care, be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products) before starting treatment with this product. While using this product, do not start, stop, or change the dosage of any other medicines you are using without your doctor's approval. Keep a list of all the products you use. Share the list with your doctor and pharmacist to reduce your risk for serious medication problems.

OVERDOSE: This medicine may be harmful if swallowed. If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.