Aspirin Tablet, Rectal Suppository, Rectal, Oral Tablet, Oral Capsule, Effervescent, Oral

By decreasing platelet aggregation, Aspirin inhibits thrombus formation on the arterial side of the circulation, where thrombi are formed by platelet aggregation and anticoagulants have little effect. Aspirin is the analgesic of choice for headache, transient musculoskeletal pain and dysmenorrhoea. It has anti-inflammatory and antipyretic properties, which may be useful. Enteric coating reduces the intestinal disturbance and gastrointestinal ulceration due to aspirin.

Uses

Aspirin is used for its antiplatelet activity in the initial treatment of cardiovascular disorders such as angina pectoris and myocardial infarction and for the prevention of cardiovascular events in a variety of conditions or procedures for patients at risk.

  • Aspirin is used as part of the initial treatment of unstable angina.
  • It is given in the early treatment of myocardial infarction.
  • It may also be of some benefit in the initial treatment of acute ischaemic stroke.
  • It is of value for the secondary prevention of cardiovascular events in patients with stable or unstable angina or those with acute or prior myocardial infarction.
  • Aspirin reduces the risk of future serious vascular events, including stroke, in patients who have already suffered an ischaemic stroke or transient ischaemic attack.
  • It is of use in the long-term management of atrial fibrillation, for the prevention of stroke in patients with contraindications to warfarin or if there are no other risk factors for stroke.
  • It is recommended for use in preventing thrombotic complications associated with procedures such as angioplasty and coronary bypass grafting.

Aspirin is also used to associated treatment for these conditions: Acute Coronary Syndrome (ACS), Anxiety, Arthritis, Atherothrombotic cerebral infarction, Cardiovascular Disease (CVD), Cardiovascular Events, Cardiovascular Mortality, Colorectal Adenomas, Colorectal Cancers, Common Cold, Coronary artery reocclusion, Death, Dyspeptic signs and symptoms, Fever, Flu Like Symptom, Flu caused by Influenza, Headache, Heterozygous Familial Hypercholesterolemia, Inflammation, Juvenile Idiopathic Arthritis (JIA), Kawasaki Syndrome, Major Adverse Cardiovascular and Cerebrovascular Events (MACCE), Migraine, Morbidity, Mucocutaneous Lymph Node Syndrome, Muscle Contraction, Myocardial Infarction, Myocardial Infarction (MI), first occurrence, Neuralgia, Pain, Pain caused by Common Cold, Pain, Menstrual, Pericarditis, Polycythemia Vera (PV), Preeclampsia, Rheumatic Pain, Rheumatism, Rheumatoid Arthritis, Rhinosinusitis, Severe Pain, Soreness, Muscle, Spondyloarthropathies, Stroke, Systemic Lupus Erythematosus (SLE), Tension Headache, Thromboembolism, Toothache, Transient Ischemic Attack, Venous Thromboembolism, Acute Inflammation, Atherothrombotic events, Death by myocardial infarction, Moderate Pain, Thrombotic events, Antiplatelet Therapy, Hemodialysis Treatment, Secondary Prevention

Trade Name Aspirin
Generic Acetylsalicylic acid
Other Names Acetylsalicylate, Acetylsalicylsäure, Acide acétylsalicylique, ácido acetilsalicílico, Acidum acetylsalicylicum, Aspirin, Aspirina, Azetylsalizylsäure, Polopiryna, Salicylic acid acetate
Weight 300mg, 75mg, , 1200mg, 125mg, 325mg, 600mg, 770mg + 60mg + 50mg, 194mg + 227mg + 33mg, 250mg + 250mg + 65mg, 325mg + 50mg + 40mg, 325mg + 50mg + 40mg + 30mg, 325mg + 200mg + 16mg, 325mg + 2mg + 7.8mg, 500mg
Type Tablet, Rectal Suppository, Rectal, Oral Tablet, Oral Capsule, Effervescent, Oral
Formula C9H8O4
Weight Average: 180.1574
Monoisotopic: 180.042258744
Protein binding

50% to 90% of a normal therapeutic concentration salicylate (a main metabolite of acetylsalicylic acid ) binds plasma proteins, particularly albumin, while acetylsalicylic acid itself binds negligibly . Acetylsalicylic acid has the ability to bind to and acetylate many proteins, hormones, DNA, platelets, and hemoglobin .

Therapeutic Class Anti-platelet drugs
Manufacturer Ideal Pharmaceutical Industries, Premier Pharmaceuticals Ltd, Therapeutics Bangladesh Ltd, United Chemicals &amp, Pharmaceuticals Ltd, Albion Pharmaceuticals Ltd, Apollo Pharmaceutical Laboratories Ltd, Biogene Pharma Ltd, Essential Drugs Company Ltd, Alliance Pharmaceuticals, Bayer Indonesia, Biopharma Nigeria Limited
Available Country Pakistan, Bangladesh, United Kingdom, Canada, United States, Indonesia, Switzerland, Nigeria
Last Updated: June 23, 2021 at 9:29 am

Dosage

Aspirin dosage

Pain, Inflammatory diseases and as Antipyretic: Aspirin 300 mg 1-3 tablets 6 hourly with a maximum daily dose of 4 g.

Thrombotic cerebrovascular or Cardiovascular disease: Aspirin 300 mg 1 tablet or Aspirin 75 mg 4 tablets daily.

After Myocardial infarction: Aspirin 75 mg 2 tablets daily for 1 month.

Following By-pass surgery: Aspirin 75 mg 1 tablet daily.

Side Effects

Side effects for usual dosage of Aspirin are mild including nausea, dyspepsia, gastrointestinal ulceration and bronchospasm etc.

Precaution

It should be administered cautiously in asthma, uncontrolled blood pressure and pregnant women.It is specially important not to use aspirin during the last 3 months of pregnancy unless specifically directed to do so by a doctor because it may cause problems in unborn child or complication during delivery. It should be administered with caution to patients in nasal polyp and nasal allergy. Aspirin penetrates into breast milk. So, it should be administered with caution to lactating mothers.

Interaction

Salicylates may enhance the effect of anticoagulants, oral hypoglycaemic agents, phenytoin and sodium valporate. They inhibit the uricosuric effect of probenecid and may increase the toxicity of sulphonamides. They may also precipitate bronchospasm or induce attacks of asthma in susceptible subjects.

Food Interaction

  • Avoid alcohol. Alcohol increases the risk of gastrointestinal bleeding.
  • Avoid herbs and supplements with anticoagulant/antiplatelet activity. Examples include garlic, ginger, bilberry, danshen, piracetam, and ginkgo biloba.
  • Take after a meal. This reduces irritating gastrointestinal effects.
  • Take with a full glass of water.

Volume of Distribution

This drug is distributed to body tissues shortly after administration. It is known to cross the placenta. The plasma contains high levels of salicylate, as well as tissues such as spinal, peritoneal and synovial fluids, saliva and milk. The kidney, liver, heart, and lungs are also found to be rich in salicylate concentration after dosing. Low concentrations of salicylate are usually low, and minimal concentrations are found in feces, bile, and sweat .

Half Life

The half-life of ASA in the circulation ranges from 13 - 19 minutes. Blood concentrations drop rapidly after complete absorption. The half-life of the salicylate ranges between 3.5 and 4.5 hours .

Clearance

The clearance rate of acetylsalicylic acid is extremely variable, depending on several factors . Dosage adjustments may be required in patients with renal impairment . The extended-release tablet should not be administered to patients with eGFR of less than 10 mL/min .

Pregnancy & Breastfeeding use

Aspirin should be avoided during the last 3 months of pregnancy. As aspirin is excreted in breast milk, aspirin should not be taken by patients who are breast-feeding.

Contraindication

Aspirin is contraindicated to the children (Reye's syndrome) under 12 years, in breast-feeding and active peptic ulcer. It is also contraindicated in bleeding due to haemophilia and other ulceration. Hypersensitivity to aspirin, hypoprothrombinaemia is also contraindicated

Acute Overdose

Overdosage produces dizziness, tinnitus, sweating, nausea and vomiting, confusion and hyperventilation. Gross overdosage may lead to CNS depression with coma, cardiovascular collapse and respiratory depression. If overdosage is suspected, the patient should be kept under observation for at least 24 hours, as symptoms and salicylate blood levels may not become apparent for several hours. Treatment of overdosage consists of gastric lavage and forced alkaline diuresis. Haemodialysis may be necessary in severe cases.

Storage Condition

Store in a cool and dry place, protected from light.

Aspirin contains Acetylsalicylic acid see full prescribing information from innovator Monograph