Pruritus is a major disorder among the skin derangements in advanced renal failure. Recent information suggests that interactions between dermal mast cells and distal ends of nonmyelinated C fibers may be important in the precipitation and regulation of the sensory stimuli.Patients having uremic pruritus have been noted to have increased levels of plasma histamine and tryptase as well as increased numbers of dermal mast cells.Cromolyn sodium is a mast cell stabilizing agent that inhibits degranulation of mast cells and the release of histamine, tryptase, and leukotrienes. It is hypothesized that oral cromolyn sodium may attenuate uremic pruritus by decreasing serum tryptase level.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
62
oral cromolyn sodium, capsule 135mg, 1 capsule 3 times daily for 8 weeks
capsule contains 135 mg lactose, 1 capsule 3 times daily for 8 weeks
Shiraz University of Medical sciences, Nemazi and Faghihi Hospital
Shiraz, Fars, Iran
pruritus
Time frame: 3 months
serum tryptase level
Time frame: 4 months
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