Benzodiazepines effects appear to produce all their pharmacologic effects by facilitating the actions of gamma-amino butyric acid (GABA). The area where it causes it effect is the principal inhibitory neurotransmitter in the CNS by enhancing their affinity towards GABA receptors leading to increased chloride conductance and hyperpolarization of the postsynaptic cell membrane, and thereby rendering […]
Diazepam remains a popular oral drug for preoperative medication of adults and is the benzodiazepine most likely to be selected for management of delirium tremens and treatment of local anesthetic induced seizures. This is considered to be one of the diazepam uses that are very common. Production of skeletal muscle relaxation by diazepam is often
The midazolam half life elimination of IM administration is comparable to that observed following the IV administration. Midazolam is approximately 97% plasma protein-bound in normal subjects. In patients with chronic renal failure, the free fraction of drug in plasma can be significantly higher than in healthy adults. In animals and humans, Midazolam has shown to
Propofol is known to possess direct antiemetic effects. Propofol antiemetic use for induction and maintenance of anesthesia has been shown to be associated with a lower incidence of postoperative nausea and vomiting (PONV) when compared to any other anesthetic drug or technique. It has been shown that total intravenous anaesthesia (TIVA) with propofol for anesthesia
Diazepam effects produce minimal depressant effects on ventilation with 0.2 mg/kg IV dose in Respiration system. The slight increase in PaCO2 is due primarily to a decrease in tidal volume. Nevertheless, nearly, small doses of diazepam (<10 mg IV) have produced apnoea. Combination of diazepam with other CNS depressants (opioids, alcohol) or administration of this
The sedative midazolam side effects and fluctuations in vital signs were the most frequent findings following parenteral administration of midazolam injection. These are affected by the lightening or deepening of anesthesia, instrumentation, intubation and use of concomitant drugs. The more frequently encountered fluctuations in vital signs of midazolam side effects included decreased tidal volume and/or
Some of the Phenobarbital side effects are discussed. Intra-arterial injection of thiopental usually results in immediate, intense vasoconstriction and severe pain radiates along the distribution of the vessel into which it has been administered. Vasoconstriction may obscure distal arterial pulses, and blanching of the extremity is followed by cyanosis. In awake patients, hypoaesthesia, muscular weakness,
The Etomidate brand name in common use is Amidate. Amidate is a carboxylated imidazole compound. The imidazole nucleus renders etomidate, like midazolam, water soluble at an acidic pH and lipid soluble at physiologic pH. It is a non-barbiturate hypnotic without analgesic properties that has less cardiovascular and respiratory depressant actions than sodium thiopental. This lipophilic
Here we study about the physical effects of barbiturates . In normovolemic subjects, thiopental, 4-5 mg/kg IV, produces a transient mild to moderate decrease in blood pressure with a compensatory increase in heart rate. However, bradycardia and junctional rhythm may occur with thiopentone. This dose of thiopental produces minimal to no evidence of myocardial depression.
Midazolam, 0.2 mg/kg IV, for induction of intravenous versed anesthesia produces a greater decrease in systemic blood pressure and increase in heart rate than does diazepam, 0.5 mg/kg IV. The haemodynamic effects of midazolam are significant in humans. In normal humans, midazolam, 0.15 mg/kg IV over 15 seconds, produces statistically significant reduction in systolic (5%)
