If you're on antibiotics, we do not recommend taking UTI Infection Control due to the methenamine. Reye’s syndrome: Children and teenagers who have or are recovering from chicken pox or flu-like symptoms should not use this product. When using this product, if changes in behavior with nausea and vomiting occur, consult a doctor because these symptoms could be an early sign of Reye’s syndrome, a rare but serious illness. Stomach bleeding warning: This product contains a nonsteroidal anti-inflammatory drug (NSAID), which may cause stomach bleeding. The chance is higher if you are 60 or older, have stomach ulcers or bleeding problems, take a blood thinning (anticoagulant) or steroid drug, take other drugs containing an NSAID (aspirin, ibuprofen, naproxen, or others), have 3 or more alcoholic drinks every day while using this product, take more or for a longer time than directed. Do not use: if you are allergic to salicylates (including aspirin). Ask a doctor before use if you have: frequent, burning urination for the first time, the stomach bleeding warning applying to you, history of stomach problems, such as heartburn high blood pressure, heart disease, liver cirrhosis, bleeding problems, diuretic use, ulcers, kidney disease, a sodium restricted diet, reached age 60 or older. Ask a doctor or pharmacist before use if you are: taking any other drug containing an NSAID (prescription or non-prescription), taking a blood thinning (anticoagulant), steroid, diabetes, gout or arthritis drug. When using this product: do not take more than the recommended dosage. Stop use and ask a doctor if: product has been used for 3 days, ringing in the ears, you experience any of the following signs of stomach bleeding: feel faint, vomit blood, have bloody or black stool, have stomach pain or upset that gets worse or lasts. If pregnant or breastfeeding, ask a health professional before use. It is especially important not to use this product (which contains sodium salicylate) during the last 3 months of pregnancy unless definitely directed to do so by a doctor because it may cause problems in the unborn child or complications during delivery. Keep out of the reach of children. In case of overdose, get medical help or contact a Poison Control Center right away 1-800-222-1222.