Australian and New Zealand journal of medicine
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Randomized Controlled Trial Comparative Study Clinical Trial
Gastrointestinal blood loss from a new buffered aspirin (Ostoprin): measurement by radiochromium and Hemoquant techniques.
Occult gastrointestinal blood loss induced by a new buffered aspirin preparation (Ostoprin, 4.0 g per day) was compared with that from an enteric-coated aspirin (Ecotrin, 3.9 g per day) in 40 patients with osteoarthritis. Blood loss was measured by the radiochromium method and compared with the HemoQuant assay of fecal heme and heme-derived porphyrins. By radiochromium, mean daily blood loss during the first week of treatment with Ostoprin increased 1.6 ml above basal compared to 0.8 ml above basal with Ecotrin (p = 0.06). ⋯ Serum salicylate levels achieved with both preparations were almost identical and encompassed the therapeutic range. HemoQuant is sufficiently sensitive to detect low-level aspirin-induced bleeding. Ostoprin appears to be a safe alternative to Ecotrin and has similar bioavailability.