the o-nitrophenyl group at position 4 of dihydropyridine of nifedipine analogues was replaced with 2-alkylthio-1-benzyl-5-imidazolyl substituent. starting from dihydroxyacetone 2-alkythio-1-benzyl- 5-formyl imidazole (3) was first synthesized which was subsequently used in synthesizing symmetrical (5a-f) and asymmetrical (6a,b) dihydropyridines. primarily pharmacological studies of the title co...

In this research we evaluated the calcium channel antagonist activity of various diester analohues of nifedipine on rat ileal smooth muscle.in these analogues,the orthophenyl group at position 4 was replaced by 1 methyl 2-meythylsulfonyl or methylthio 5-imidazolyl.wistar rats(180-250g) were killed by a blow to the head.the intestine was removed above the ileucecal junction and longitudinal smoo...

Various 1and 2-substituted and 1,2-fused 1,4-dihydropyridine-5-phosphonate derivatives were designed and synthesized as analogues of 1,4-dihydropyridine-3,5-dicarboxylate, and their antihypertensive activities were examined. Several compounds proved to be equal or superior to nifedipine in lowering blood pressure in normotensive and spontaneously hypertensive rats. Among these compounds, 1-subs...

Nifedipine, sold under the brand name Adalat and Procardia, among others, is a calcium channel blocker medication used to manage angina, high blood pressure, Raynaud's phenomenon, premature labor. The review presented here systematizes various analytical bio-analytical methods developed for Nifedipine alone in combination with other drugs. It represents comprehensive data of UV-Visible spectros...

The agents commonly called the calcium channel blockers comprise an increasing number of agents, including the prototypical verapamil (Calan, Isoptin), nifedipine (Adalat, Procardia), and diltiazem (Cardizem). These agents are a chemically and pharmacologically heterogeneous group of synthetic drugs, but they possess the common property of selectively antagonizing Ca movements that underlie the...

objective(s) this study aimed to investigate and to compare the effects of nifedipine and amlodipine, dihydropyridine (dhp) calcium channel blockers (ccbs) on perfusion pressure of isolated perfused rat kidney. materials and methods following the establishment of renal perfusion with a constant baseline pressure of 85-95 mmhg, the renal vasculature was constricted by phenylephrine (pe) injectio...

background medical sphincterotomy has gained popularity as a treatment for anal fissure. calcium channel blockers in topical forms could also be appropriate with low adverse effects. objectives this was a prospective randomized controlled trial to compare topical and oral nifedipine in the treatment of chronic anal fissure. patients and methods a prospective randomized controlled trial was cond...

[(3)H]Nitrendipine, a potent calcium channel antagonist [3-ethyl-5-methyl-1-1,4-dihydro-2,6 - dimethyl - 4 - (3 - nitrophenyl) - 3,5 - pyridine carboxylate], was used to label high affinity binding sites on membranes prepared from bovine aortic smooth muscle. The binding of [(3)H]nitrendipine is rapid (t(1/2) < 5 min) and reversible at 37 degrees C. The binding sites have a high affinity for [(...

intravenous hydralazine is a commonly administered arteriolar vasodilator that is effective for hypertensive emergencies associated with pregnancy. oral nifedipine is an alternative in management of these patients. in this study the efficacy of nifedipine and hydralazine in pregnancy was compared in a group of iranian patients. fifty hypertensive pregnant women were enrolled in the study. a ran...

chronic anal fissure is the most common cause of anal pain associated with internal anal sphincter hypertonia. reduction of hypertonocity is a special treatment for fissure healing. for this purpose chronic anal fissures were conventionally treated by anal dilatation or by lateral sphincterotomy. however, both of these methods may cause a degree of incontinence in some patients. the uptake of m...