What is Percogesic Backache Relief? Uses, warnings & side effects

Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.

Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

Keep all medicine out of the reach of children. Never share your medicine with anyone.

Oral routeAsk your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.

You should not use this medicine if you have had an allergic reaction to magnesium salicylate or aspirin. Do not use this medicine if you have kidney disease, liver disease, or a heart disease called carditis, or if you have taken salicylates (such as aspirin) over a long period of time.

Make sure your doctor knows if you are pregnant or breastfeeding.

This medicine may cause unusual bleeding in certain people. Make sure your doctor knows if you have bleeding problems, a vitamin K deficiency, stomach ulcers, or gastritis. Tell your doctor if you have unusual bleeding, such as nosebleeds, bleeding gums, dark urine, or blood in your stool.

Deep or fast breathing with dizziness, numbness of feet, hands and around the mouth.

Tell any doctor or dentist who treats you that you are using this medicine. You may need to stop using this medicine several days before you have surgery or medical tests.

Continuous ringing or buzzing noise in ears.

Dimness of vision.

Restlessness, tremors, or convulsions.

Unusual bleeding, bruising or weakness.

Vomiting of blood or material that looks like coffee grounds.

You should not take this medicine with a blood thinner such as warfarin (Coumadin®), probenecid (Probalan®), or methotrexate (Trexall®). Make sure your doctor knows if you are using medicines to treat seizures (such as phenobarbital, phenytoin, or Dilantin®) or a diuretic ("water pill") called spironolactone (Aldactazide®, Aldactone®).

Your doctor will need to know if you are using a diabetes medicine that you take by mouth, such as chlorpropamide, glimepiride, glipizide, glyburide, tolbutamide, Amaryl®, Diabeta®, Glucotrol®, or Micronase®. You should not take medicines that contain magnesium, such as antacids (Gaviscon®, Maalox®, Mylanta®) or nutritional supplements, without asking your doctor.

Tell any doctor or dentist who treats you that you are using this medicine. You may need to stop using this medicine several days before you have surgery or medical tests.