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Solutions that have viscous and some elastic properties intended to be instilled into the urinary bladder (i.e., intravesical). These solutions typically consist of aqueous mixtures containing as main components compounds such as sodium hyaluronate, a purified sodium salt of hyaluronic acid (a glycosaminoglycan, [GAG]) or chondroitin sulfate, a sulfated GAG, polymers with a long molecular chain. The solutions are instilled into the bladder via a urinary catheter; they are designed to help temporarily replenish the deficient GAG layer on the bladder epithelium in order to treat interstitial cystitis. Intravesical viscoelastic solutions are usually supplied in sterilized vials.
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