Abstract. The US patented polyherbal formulation for the prevention and management of type II diabetes and its vascular complications was used for the present study. The xanthone glycoside mangiferin is one of the major effector constituents in the Salacia species with potential anti-diabetic activity. The pharmacokinetic differences of mangiferin following oral administration of pure mangiferin and polyherbal formulation containing Salacia species were studied with approximately the same dose 30 mg/kg mangiferin and its distribution among the major tissue in Wistar rats. Plasma samples were collected at different time points (15, 30, 60, 120, 180, 240, 360, 480, 600,1,440,2,160, and 2880 min) and subsequently analyzed using a validated simple and rapid LC-MS method. Plasma concentration versus time profiles were explored by non-compartmental analysis. Mangiferin plasma exposure was significantly increased when administered from formulation compared to the standard mangiferin. Mangiferin resided significantly longer in the body (last mean residence time (MRT last )) when given in the form of the formulation (3.65 h). C max values of formulation (44.16 μg/mL) administration were elevated when compared to equivalent dose of the pure mangiferin (15.23 μg/mL). Tissue distribution study of mangiferin from polyherbal formulation was also studied. In conclusion, the exposure of mangiferin is enhanced after formulation and administration and could result in superior efficacy of polyherbal formulation when compared to an equivalent dose of mangiferin. The results indicate that the reason which delays the elimination of mangiferin and enhances its bioavailability might the interactions of the some other constituents present in the polyherbal formulation. Distribution study results indicate that mangiferin was extensively bound to the various tissues like the small intestine, heart, kidney, spleen, and liver except brain tissue.

Obstructive sleep apnea (OSA) is a common sleep disorder characterized by complete cessation of upper airflow during sleep, leading to repetitive episodes of desaturations and arousals. The symptoms include excessive daytime somnolence and are associated with a significant cardiovascular morbidity and mortality. The prevalence of OSA is higher in men with an approximate rate of 14 and 5% in women respectively. Typical risk factors for obstructive sleep apnea in the normal adult population are obesity, aging, gender, menopause, ethnicity, genetical predisposition, craniofacial anatomy, smoking, alcohol consumption and some other factors such as REM sleep, surface tension, and impaired sensory processing. Several screening questionnaires can be performed in outpatient settings to identify the patient symptoms. Polysomnography is considered as the gold standard for diagnosis of OSA. Different surgical treatments and devices are readily available for an effective management of this disease. Proper diagnosis and treatment improves not only the quality of life but also relatively decreases patient morbidity and mortality. A multifaceted approach is necessary for an accurate management of the OSA.

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