Sterile INDOCIN* I.V. (Indomethacin for Injection) for intravenous administration is lyophilized indomethacin for injection. Each vial contains indomethacin for injection equivalent to 1 mg indomethacin as a white to yellow lyophilized powder or plug. Variations in the size of the lyophilized plug and the intensity of color have no relationship to the quality or amount of indomethacin present in the vial.

Indomethacin for injection is designated chemically as 1-(4-chlorobenzoyl)-5-methoxy-2-methyl- 1 H-indole-3-acetic acid, sodium salt, trihydrate. Its molecular weight is 433.82. Its empirical formula is C₁₉H₁₅CINNaO₄• 3H₂0 and its structural formula is:

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