The mechanisms of the beta-adrenoceptor-mediated relaxation induced by dopamine in guinea pig taenia caecum were examined. The relaxant response to dopamine was unaffected by propranolol (10(-8)-10(-5) M) or phentolamine (10(-8)-10(-5) M). Atenolol (3 x 10(-7)-3 x 10(-4) M), butoxamine (10(-7)-10(-4) M), prazosin (10(-8)-10(-5) M), yohimbine (10(-8)-10(-5) M), SCH 23390 (10(-8)-10(-5) M) and ha...

The in-vitro effects of methanolic extract (MCSL) and aqueous infusion (ACSL) o sieberiena on the motility of the rat intestines were studied and compared with tho (MCAL and ACAL) “Senna”. All the extracts and infusion relaxed the ileum dose-d effects were blocked by tolazoline, indicating that α–adrenergic receptors were contracted the colon dose-dependently and was blocked by atropine(1.7x10 ...

Thiocolchicoside is a commonly used muscle relaxant in the treatment of acute painful muscle spasms. It exhibits a selective affinity for the inhibitory gamma-aminobutyric acid and glycinergic receptors, although, the exact mechanism for muscle relaxant property is not known. It has a proconvulsant action and hence should be avoided in patients predisposed to seizures. The recent drug warning f...

The study was designed to investigate the skeletal muscle relaxant activity of vicia faba (400mg/kg, p.o) by using rota rod apparatus. Experiments were carried out on albino mice and the animals were randomly allotted to the different control, test and standard (diazepam 4mg/kg, p.o) groups. The methanolic extract significantly reduced the fall off time (4.33sec) in comparision with the fall of...

This paper describes the synthesis of 1,4-dihydropyridine compounds (DHPs) endowed with good muscle relaxant activity and stability to light. Six new condensed DHPs were synthesized by the microwave irradiation method. A long-chain ester moiety [2-(methacryloyloxy)ethyl] and various substituents on the phenyl ring were demonstrated to affect the muscle relaxant activity occurring in isolated ra...

  Preterm labor is one of the major causes of neonatal mortality and morbidity. Despite significant improvement in care for premature neonates, the most suitable and inexpensive treatment is prevention of preterm labor by inhibiting uterine contractions. The aim of this research is to obtain scientific evidence for the relaxant effect of ketotifen on the rat uterus and to provide the preclinica...