MST

MST is a nonsteroidal anti-inflammatory drug (NSAID) that belongs to a group of drugs called salicylates (sa-LIS-il-ates).

MST is used to give temporary relief from backache.

MST may also be used for reasons that are not mentioned in this medication guide.

Use exactly as directed on the label, or as prescribed by your doctor.

Take this medicine with a full glass of water.

Take with food if this medicine upsets your stomach.

Call your doctor if your symptoms get worse or you still have pain after 10 days. Tell your doctor if you have a fever that lasts longer than 3 days, or if you have any redness or swelling.

If you need surgery or dental work, tell the surgeon or dentist ahead of time that you are using MST. You may need to stop using the medicine for a short time.

Store at room temperature away from moisture and heat.

MST can raise your chances of having a fatal heart attack or stroke. Do not use this medicine right before or after heart bypass surgery (coronary artery bypass graft, or CABG). This medicine may also lead to stomach or intestinal bleeding, which can be deadly.

Do not give this medicine to a child or teenager who has a fever, flu symptoms, or chickenpox.

MST can raise your chances of having a fatal heart attack or stroke, even if you do not have any risk factors. Do not use MST just before or after heart bypass surgery (coronary artery bypass graft, or CABG).

MST may also lead to stomach or intestinal bleeding, which can be deadly. These issues can happen unexpectedly while you are using this medicine, particularly in older adults.

You should not use this medicine if you are allergic to aspirin or other salicylates.

Ask a doctor before giving this medicine to a child younger than 12 years old. Do not give this medicine to a child or teenager with a fever, flu symptoms, or chickenpox. Salicylates can cause Reye's syndrome, a serious and sometimes fatal condition in children.

Ask a doctor or pharmacist if this medicine is safe for you to use if you have ever had:

• bleeding problems;
• heartburn, stomach ulcer, or stomach bleeding;
• asthma;
• heart disease, high blood pressure;
• liver disease, cirrhosis, or if you drink more than 3 alcoholic beverages per day;
• kidney disease;
• arthritis, gout; or
• diabetes.

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

If you are pregnant, you should not take this medicine unless your doctor tells you to. Taking an NSAID during the last 20 weeks of pregnancy can lead to serious heart or kidney issues in the unborn baby and possible complications with your pregnancy.

Get emergency medical help if you have signs of an allergic reaction: sneezing, runny or stuffy nose; wheezing or trouble breathing; hives; swelling of your face, lips, tongue, or throat.

MST may cause serious side effects. Stop using MST and call your doctor right away if you have:

• new symptoms such as redness or swelling;
• ringing in your ears, hearing loss;
• a light-headed feeling, like you might faint;
• new or worsening stomach pain; or
• bloody or tarry stools, coughing up blood, or vomit that looks like coffee grounds.

Less serious side effects may happen more often, and you may not have any at all.

This is not a complete list of side effects, and others may happen. Call your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.

Since MST is taken as needed, you may not have a set dosing schedule. If you miss a dose and it's almost time for your next dose, just skip the missed dose. Do not take two doses at the same time.

Seek emergency medical help or call the Poison Help line at 1-800-222-1222. Taking too much magnesium salicylate can be deadly.

Avoid alcohol. Drinking heavily can raise your chances of stomach bleeding.

Talk to a doctor or pharmacist before using other medicines for pain, fever, swelling, or cold/flu symptoms. They might have ingredients similar to MST (like aspirin, ibuprofen, ketoprofen, or naproxen).

Ask a doctor or pharmacist if it is safe for you to use MST if you are also using:

• medicine to treat gout or arthritis;
• insulin or oral diabetes medicine; or
• other NSAIDs (nonsteroidal anti-inflammatory drugs)--aspirin, ibuprofen (Advil, Motrin), naproxen (Aleve), celecoxib, diclofenac, indomethacin, meloxicam, and others;
• a blood thinner--warfarin, Coumadin, Jantoven;

This list is not complete. Other drugs may affect MST, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.