SIDE EFFECTS: Upset stomach or nausea may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. If your doctor has directed you to use this medication, remember that 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. This medication may raise your blood pressure. Check your blood pressure regularly and tell your doctor if the results are high. Tell your doctor right away if any of these unlikely but serious side effects occur: stomach pain, heartburn, swelling of ankles/feet/hands, sudden/unexplained weight gain, hearing changes (e.g., ringing in the ears, decreased hearing). Stop taking magnesium salicylate and tell your doctor right away if any of these rare but very serious side effects occur: fast/pounding heartbeat, signs of kidney problems (such as change in the amount of urine), easy bruising/bleeding, signs of infection (e.g., fever, persistent sore throat), dark urine, yellowing eyes/skin, unusual/extreme tiredness, severe stomach/abdominal pain, persistent nausea/vomiting. 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 any other side 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 taking magnesium salicylate, tell your doctor or pharmacist if you are allergic to it; or to aspirin or other NSAIDs (e.g., ibuprofen, naproxen, salsalate); 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. This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: severe kidney disease. Before using this medication, tell your doctor or pharmacist your medical history, especially of: aspirin-sensitive asthma (a history of worsening breathing with runny/stuffy nose after taking aspirin or other NSAIDs), kidney disease, liver disease, poorly controlled diabetes, stomach/intestine/esophagus problems (e.g., bleeding, ulcers, recurring heartburn), heart disease (e.g., congestive heart failure, history of heart attack), high blood pressure, stroke, swelling of the ankles/feet/hands, a severe loss of body water (dehydration), blood disorders (e.g., anemia), bleeding/clotting problems, asthma, growths in the nose (nasal polyps), certain genetic conditions (G-6-PD deficiency, pyruvate kinase deficiency). Before having surgery, tell your doctor or dentist that you are using this medication. This medicine may cause stomach bleeding. Daily use of alcohol and tobacco, especially when combined with this medicine, may increase your risk for stomach bleeding. Limit alcohol and stop smoking. Consult your doctor or pharmacist for more information. Caution is advised when using this drug in the elderly because they may be more sensitive to its side effects, especially stomach bleeding and kidney effects. This medication is similar to aspirin. Children and teenagers should not take this medication if they have chickenpox, flu, or any undiagnosed illness, or if they have just been given a live virus vaccine, without first consulting a doctor about Reye's syndrome, a rare but serious illness. This medication is not recommended for use during pregnancy. Consult your doctor before using this medication if you are or think you may be pregnant. Tell your doctor right away if you become pregnant while taking this medication. Do not use this medication during the last 3 months of pregnancy because of possible harm to the unborn baby or problems during delivery. This drug may pass into breast milk and could have undesirable effects on a nursing infant. Therefore, breast-feeding is not recommended while using this drug. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include: anabolic steroids (e.g., danazol, oxandrolone), carbonic anhydrase inhibitors (e.g., acetazolamide), certain drugs for seizures (phenytoin, phenobarbital, valproic acid), cidofovir, corticosteroids (e.g., prednisone), drugs for gout (e.g., probenecid, sulfinpyrazone), gabapentin, lithium, magnesium-containing drugs (e.g., milk of magnesia), methotrexate, pemetrexed, tenofovir. This medication may increase the risk of bleeding when taken with other drugs that also may cause bleeding. Examples include anti-platelet drugs such as clopidogrel, "blood thinners" such as dabigatran/enoxaparin/warfarin, among others. Check all prescription and nonprescription medicine labels carefully since many contain pain relievers/fever reducers (NSAIDs such as aspirin, ibuprofen, ketorolac, or naproxen) that are similar to this drug and, if taken together, may increase your risk for side effects. However, if your doctor has directed you to take low-dose aspirin for heart attack or stroke prevention (usually at dosages of 81-325 milligrams a day), you should continue taking it unless your doctor instructs you otherwise. Ask your doctor or pharmacist for more details. Some medications (e.g., ciprofloxacin, tetracycline) cannot be taken with magnesium. The magnesium in this product may bind with these medication, preventing their full absorption. Take these medications 2-3 hours before or after taking magnesium salicylate. Ask your pharmacist for more details. This medication may interfere with certain laboratory tests (including certain urine glucose tests), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.

OVERDOSE: 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. Symptoms of overdose may include: dizziness, ringing in the ears, weakness, nausea, vomiting, drowsiness, fast breathing, confusion, seizures.