A pharmaceutical composition comprising a pharmaceutically active agent and a salt of said pharmaceutically active agent with the proviso that said composition does not contain hydrolyzed cellulose, wherein said pharmaceutical active agent is a weak acid or weak base. The present invention is also directed to a new ibuprofen form having, when potassium is present in said form as a counter ion, an IR peak at 1706 cm
−1
shifted and broadened in absorbance relative to racemic ibuprofen free acid, the form's characteristic absorbance profile from 1000 to 650 cm
−1
and broadened in absorbance relative to racemic ibuprofen free acid, the form's characteristic absorbance profile from 1000 to 650 cm
−1
and D-spacings of 21.1, 7.1, and 3.4 Å by X-ray diffraction.
一种制药组合物,包括一种药物活性剂和该药物活性剂的盐,但该组合物不含
水解
纤维素,其中所述药物活性剂是弱酸或弱碱。本发明还涉及一种新的
布洛芬形式,当
钾存在于该形式中作为对离子时,其在1706 cm-1处的IR峰相对于外消旋
布洛芬自由酸发生了位移和增宽,该形式的特征吸收谱从1000到650 cm-1处发生了增宽,并且其D间距分别为21.1、7.1和3.4Å,通过X射线衍射确定。