nigella sativa (family ranunculaceae) is a widely used medicinal plant throughout the world. n. sativa is referred in the middle east as a part of an overall holistic approach to health. pharmacological properties of n. sativa including immune stimulant, hypotensive, anti-inflammatory, anti-cancer, antioxidant, hypoglycemic, spasmolytic and bronchodilator have been shown. reactive oxygen specie...

Certain nonsteroidal anti-inflammatory drugs antagonize the action of antihypertensive therapy. Indomethacin has been shown to abrogate the antihypertensive effect of beta-adrenergic receptor blockers, diuretics, converting enzyme inhibitors, and several antihypertensive drug combinations, and the accumulated evidence on piroxicam indicates that it also raises arterial pressure in treated patie...

Aspirin exerts its analgesic, antipyretic and anti-inflammatory actions by inhibiting the enzyme cyclooxygenase and thus preventing the formation and release of prostaglandins. The elucidation by John Vane of the mechanism of action of aspirin in 1971 was followed twenty years later by the discovery of a second cyclooxygenase enzyme, COX-2 and the rapid development of selective inhibitors of th...

The concept was appealing in its simplicity. Traditional nonsteroidal antiinflammatory drugs (NSAIDs) inhibited both isoforms of the enzyme cyclooxygenase responsible for the first step in the conversion of arachidonic acid into a variety of prostaglandins, thromboxanes, and leukotrienes throughout the body. The anti-inflammatory and pain-relieving effects of NSAIDs resulted from inhibition of ...

cause gastrointestinal toxicity. We examined the skin as a novel route for continuous low-dose aspirin administration and selective inhibition of platelet cyclooxygenase in humans. Methods and Results. Aspirin 250 or 750 mg/d for 10 days induced a dose-dependent inhibition of serum thromboxane (TX) B2. At the highest dose, five of six subjects responded, with a mean reduction in serum TXB2 of 9...

Neuroinflammation is one of the key pathological events involved in the progression of brain damage caused by cerebral ischemia. Metabolism of arachidonic acid through cyclooxygenase (COX) enzymes is known to be actively involved in the neuroinflammatory events leading to neuronal death after ischemia. Two isoforms of COX, termed COX-1 and COX-2, have been identified. Unlike COX-1, COX-2 expres...

The Promise Introduction of selective cyclooxygenase (COX)-2 inhibitors held a promise of improved treatment of arthritis without the gastrointestinal effects associated with aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs), which effect both COX-1 and COX-2 activity. Celecoxib, etodolac, meloxicam, and rofecoxib are classified as selective COX-2 inhibitors. Initial placebo and l...

The characteristics of the time-dependency of nonsteroidal antiinflammatory drugs (NSAIDs) and their active sites in inhibiting cyclooxygenase activity were investigated using bovine seminal vesicle microsomal fraction. The Hill's coefficients of the inhibition curve of most NSAIDs were approximately 1.0, except for some drugs which had Hill's coefficients that were obviously more than 1.0. The...