Prazosin is a medication classified as an alpha-1 adrenergic blocker. It belongs to the class of drugs known as alpha-adrenergic antagonists. Prazosin primarily acts on alpha-1 receptors, blocking the effects of norepinephrine and leading to vasodilation and relaxation of smooth muscle in blood vessels. Here are key points about prazosin: Mechanism of Action Prazosin selectively…
Phenoxybenzamine is a non-selective, irreversible alpha-adrenergic receptor antagonist primarily used in conditions associated with excess catecholamine activity. It belongs to the class of haloalkylamine derivatives and plays a crucial role in managing hypertension associated with adrenal tumors, particularly pheochromocytoma. Unlike many other adrenergic blockers, phenoxybenzamine forms a covalent bond with alpha receptors, leading to long-lasting…
Phentolamine is a medication classified as an alpha-adrenergic antagonist, specifically an alpha-blocker. It acts by blocking the effects of norepinephrine and other similar neurotransmitters at alpha-adrenergic receptors. Phentolamine is a non-selective alpha-blocker, meaning it blocks both alpha-1 and alpha-2 receptors. Here are key points about phentolamine: 1. Mechanism of Action Phentolamine blocks the action of…
Tolazoline is a medication that belongs to the class of drugs known as alpha-adrenergic blockers. It is primarily used as a vasodilator, which relaxes and widens blood vessels. This vasodilatory effect is attributed to its ability to block alpha-adrenergic receptors. Here are some key points about tolazoline: Mechanism of Action Tolazoline acts as a non-selective…
Adrenergic antagonists, also known as adrenergic blockers or adrenergic receptor antagonists, are a class of drugs that interfere with the actions of the sympathetic nervous system, specifically by blocking the effects of neurotransmitters like norepinephrine and epinephrine (adrenaline) at adrenergic receptors. These receptors are found throughout the body and are crucial in regulating various physiological…
Filtration is the process wherein a filter medium separates a heterogeneous mixture of fluid and solid particles. The filter medium allows the passage of fluid but retains the solid particles. The process retains oversized solids in the fluid, but it does not complete the separation, as the filtrate may contaminate with solid particles smaller in…
A triple roller mill is used to mix semisolids while preparing ointments, creams, pill masses, wet mass for making granules, etc. Principle The material experiences a high shear developed by the differential speed and the narrow space between the rollers. Under the influence of this shear, aggregates, and particles get crushed, and the drug gets…
Silverson emulsifiers mix or homogenize coarse particles in the emulsion and suspension, reducing them to fine particles. Its capacity ranges from 1 ml to 12 lt, and its ability to mix in-line with flow rates is up to 20 lt/min. Principle Silverson emulsifier works on the principle of shearing forces and turbulence produced by the…
Turbines are mechanical devices that mix different fluids with blades and impellers. Turbines are used for mixing high viscosity liquids because of the greater shear forces produced by them than the propellers. They are used especially for the preparation of emulsion. For preventing vortex formation, baffles are often used. Construction ¨ Turbines consist of a…
A Double cone blender is a competent and versatile machine used for uniform blending of granules and dry powders. It is made up of stainless steel. It is available in various working capacities ranging from 5 – 500 liters. Principle A double-cone blender produces a homogeneous solid-solid mixture. This equipment involves axial mixing as the…
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