Process for the preparation of a solid pharmaceutical dosage form
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United States of America Patent
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Jul 23, 2002
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N/A
app pub date -
May 4, 1999
filing date -
Mar 2, 1995
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Abstract
A process for the preparation of a solid pharmaceutical dosage form comprising a carrier and, as active ingredient, a compound which exists, in solution, in an equilibrium between a free acid or free base form and a salt form, and for which there is a difference in volatility between the free acid or free base form and the salt form. The process includes the steps of solidifying a mixture of the compound and carrier in a solvent, and subsequently removing the solvent from the solidified mixture. A pH modifier is added to the mixture prior to solidification to shift the equilibrium to favor the less volatile form of the active ingredient.
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