Acetylsalicylic acid (Asa) belongs to the groups of medications called analgesics (pain relievers), antipyretics (Fever reducers), anti-inflammatories (inflammation reducers), and platelet aggregation inhibitors (anticlotting agents). It works by interfering with the production of compounds in the body that cause pain, fever, inflammation, and Blood Clots.
Available form
Tablet, Capsule, Suppository, Tablet
Manufacturer
Apotex, Jamp Pharma Corporation, Odan Laboratories, Pharmascience, Vita Health Products
Dosage
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The recommended dose of ASA for adults varies widely according to the particular condition being treated.
Adult dosage:
To treat adults with pain or fever, the recommended dose is 325 mg to 650 mg every 4 to 6 hours as needed. The maximum daily dose is 4,000 mg, unless otherwise directed by your doctor. ASA should not be used for longer than 5 days in a row to treat pain or 3 days in a row for fever. Talk to your doctor if either of these conditions persist. For adults with conditions caused by inflammation such as rheumatoid arthritis, the usual dose is 975 mg 4 to 6 times daily on a regular basis. Sometimes, higher doses may be used.
To treat migraine headache pain, the recommended adult dose is 1,000 mg at the onset of pain or symptoms.
To prevent a first nonfatal heart attack, TIA, a second heart attack, or a second stroke, the usual dose for adults is 81 mg to 325 mg once daily, depending on your doctor's instructions.
During a heart attack, the recommended ASA dose is 160 mg to 162 mg chewed or crushed. As soon as you suspect you are having a heart attack, call an ambulance and take the recommended ASA dose, providing you have no Allergies or other conditions or factors that would indicate ASA is not right for you. This dose should then be continued, under your doctor's supervision, for a month to reduce the risk of a second heart attack.
To prevent blood clots after total hip replacement surgery, the recommended dose is 162 mg to 325 mg taken daily unless otherwise directed by your doctor.
Children's dosage:
ASA (Asa-antiplatelet) is not recommended to be used by children, teenagers, or young adults to treat fever (see the section, "Are there any other precautions or warnings for ASA (Asa-antiplatelet)?"). However, if recommended by a doctor in other circumstances such as to treat pain, the recommended dose is 10 mg to 15 mg per kilogram of body weight every 6 hours as needed to a maximum of 2,400 mg per day (ask your doctor or pharmacist to give you the correct dose if you are unsure).
When used as an anti-inflammatory, the recommended dose is 60 mg to 125 mg per kilogram of body weight daily in 4 to 6 divided doses.
Because ASA can cause stomach irritation and upset, specially coated tablets called enteric-coated are recommended when taking ASA for long periods of time. This special coating prevents the tablet from dissolving until it has passed the stomach and moved into the small intestine. This coating also means that it will take longer for the medication to take effect, so do not use enteric-coated tablets when fast relief is required. ASA should also be taken with food to prevent stomach upset. Enteric-coated medications can be taken without food.
Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way you are taking the medication without talking to your doctor.
It is important that ASA (Asa-antiplatelet) be taken exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.
Store ASA (Asa-antiplatelet) at room temperature, protect it from moisture, and keep it out of the reach of children.
Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.
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*Actual pricing may differ. Medication is only available by prescription. The cost may be subsidised by your provincial or private health plan.
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