Controlled-release tablet formulation of isoniazid

Guar (GG) and Karaya gums (KG) alone and in combination with hydroxy-propylmethylcellulose (HPMC) were evaluated as release retarding materials to formulate a controlled-release tablet dosage form of isoniazid (1). In vitro release of 1 from tablets followed non-Fickian release profile with rapid initial release. Urinary excretion studies in normal subjects showed steady-state levels of 1 for 13 h. In vitro and in vivo data correlated (r = 0.9794). The studies suggested the potentiality of GG and KG as release retarding materials in formulating controlled-release tablet dosage forms of 1.

Incidence of Gardnerella vaginalis infection in pregnant & non-pregnant women with non-specific vaginitis

The occurrence of G. vaginalis in patients with non-specific vaginitis (NSV) was studied. Of the 200 women with vaginitis screened, 84 were diagnosed to have non-specific vaginitis. G. vaginalis was isolated from 33 (39.28%) patients either alone or in combination with other organisms, while one of the healthy controls with no vaginal discharge yielded G. vaginalis on culture. The nature of vaginal discharge could not be correlated with the type of infection. Clue cells and amine test gave inconsistent results in the presence of G. vaginalis infection. A varying susceptibility pattern of G. vaginalis was observed against various antimicrobials, metronidazole (95%) and gentamicin (75%) showing highest sensitivity.