CAPRIN Gastro-resistant tablet Ref.[50288] Active ingredients: Acetylsalicylic acid

Source: Health Products Regulatory Authority (IE)  Revision Year: 2020  Publisher: Pinewood Laboratories Ltd, Ballymacarbry, Clonmel, Co. Tipperary, Ireland

5.1. Pharmacodynamic properties

Aspirin is an analgesic and antipyretic with anti-inflammatory properties.
Aspirin inhibits prostaglandin synthetase.
Aspirin inhibits platelet aggregation.

Experimental data suggest that ibuprofen may inhibit the effect of low dose aspirin on platelet aggregation when they are dosed concomitantly. In one study, when a single dose of ibuprofen 400mg was taken within 8 h before or within 30 min after immediate release aspirin dosing (81mg), a decreased effect of ASA on the formation of thromboxane or platelet aggregation occurred.

However, the limitations of these data and the uncertainties regarding extrapolation of ex vivo data to the clinical situation imply that no firm conclusions can be made for regular ibuprofen use, and no clinically relevant effect is considered to be likely for occasional ibuprofen use.

5.2. Pharmacokinetic properties

Absorption: Aspirin is rapidly absorbed after oral administration, with some hydrolysis to salicylate before absorption. Absorption is delayed by the presence of food and is impaired in patients suffering migraine attacks.

Absorption is more rapid in patients with achlorhydria and also following administration of polysorbates and antacids.

To prevent stomach irritation, CAPRIN 75mg tablets have a special enteric coating so that aspirin is not released until it has passed through the stomach.

Distribution: Aspirin is found in the saliva, milk, plasma and synovial fluid at concentration less than blood and crosses the placenta. Salicylate/extensive protein binding.

Aspirin/protein binding to a small extent.

Metabolism: In the blood, rapid hydrolysis to salicylic acid; glucuronic acid/glycine conjugation to form glucuronides and salicyluronic acid, oxidation of a small proportion.

Excretion: Excreted in the urine mainly as salicyluronic acid. Salicylate reabsorbed by renal tubules in acid urine, and alkaline diuresis will increase the rate of excretion; 85% of dose excreted as free salicylate.

5.3. Preclinical safety data

Not applicable.

© All content on this website, including data entry, data processing, decision support tools, "RxReasoner" logo and graphics, is the intellectual property of RxReasoner and is protected by copyright laws. Unauthorized reproduction or distribution of any part of this content without explicit written permission from RxReasoner is strictly prohibited. Any third-party content used on this site is acknowledged and utilized under fair use principles.