The CLINICAL PHARMACOLOGY GeneralPropranolol is an agent of receiving-I block nonselective, beta-adrenergic that does not own no other activity of autonomic nervous system. When the access to the sites of the spy is blocked by propranolol, the cronotrópicas, inotrópicas answers, and vasodilator to the stimulus beta-adrenergic are diminished proportionally. In major of the dosages that required for the blockade beta, propranolol also exerts to quinidina-like or anesthetic-the action of the membrane, that affects the cardiac potential of action. The meaning of the action of the membrane in the treatment of arrhythmias is uncertain. The mechanism of the mechanism of ActionThe of the effect of antihypertensive of propranolol has not settled down. Between the factors that contribute to the action of antihypertensive it is: (1) cardiac volume handicapped, (2) inhibition of the launching of renina by the kidneys, and (3) diminution of the tonic comprehensive exit of the nerve of vasomotor centers in the brain. Although total the peripheral resistance can increase initially, readjusts or underneath the level of the previous treatment with the chronic use of propranolol. The effects of propranolol on volume of the plasma appear to be of smaller importance and something variable. The FARMACINÉTICA AND the AbsorptionPropranolol METABOLISM of the DRUG are highly lipofílicos and it is absorbed almost totally after the oral administration. Nevertheless, it undergoes stop metabolism of first passage by the liver and in average, only near 25% of the reach of propranolol the systemic circulation. Of simple dose, study of the food-effect in 36 healthy subjects demonstrated that a food of high degree in fats administered with InnoPran XL in 10 P.M., crescents the lag time from the 3 to 5 hours and the time to reach the maximum concentration as of 11,4 hours, under conditions fed, without effect on the DOSAGE AND the ADMINISTRATION of AUC.See). After the administration of several doses of InnoPran XL in 10PM under conditions of fasting, the lag time of stationary state it was between 4-5 hours and the concentrations principles of the plasma of propranolol were reached approximately 12-14 hours after dosing. The levels of the channel of propranolol were reached 24-27 hours after dosing, and persisted by 3-5 hours after the following dose. The period of the elimination of propranolol was approximately 8 hours. The levels of the plasma of propranolol demonstrated to dose proportional increases after only and the multiple administration of magnesium 80, 120, and 160 of InnoPran XL.At of stationary state, the bioavailability of the dose of magnesium 160 of InnoPran XL and long temporarias capsules of hydrochlorate of propranolol did not differentiate perceivably. DistributionApproximately 90% of propranolol of circulation is limited proteins of the plasma (albumen and alpha 1 acid glycoprotein). The obstacle is enantiómero-selective. The S-isomeric is limited preferential the alpha 1 glycoprotein and the R-isomeric limited preferential albumen. The volume of distribution of propranolol is approximately 4& #160; liters. The metabolism and metaboliza EliminationPropranolol extensively with the majority of the metabilitos that appear in the urine. Propranolol metaboliza through three primary routes: the aromatic hidroxilación (mainly 4 hidroxilación), N-dealkylation followed by the additional oxidation of the side chain, and glucuronidation direct. It has been considered that the contributions of the percentage of these routes to add metabolism are 42%, 41%, and 17%, respectively, but with considerable variability between the individuals. The four main metabilitos are glucuronide of propranolol, acid naphthyloxylactic, and glucurónicas conjugations of acid and sulphate of propranolol hidroxi 4. The Ines studies vitro have indicated that the aromatic hidroxilación of propranolol is catalyzed mainly by the polymorphic oxidation of CYP2D6.Side-chain is half-full mainly by CYP1A2 and of propranolol of CYP2D6.4-hydroxy is in favor until certain point a weak inhibitor of CYP2D6.Propranolol is also a substratum for CYP2C19 and a substratum for the intestinal transporter of the emanation, p-glycoprotein (PGP). The studies suggest the PGP dose-not nevertheless is limiting after the intestinal absorption of propranolol in the therapeutic range generally of the dose. In healthy subjects any difference between metabolizers extensive CYP2D6 (ccsme) and metabolizers poor (PMs) with respect to oral period of the separation or the elimination was not observed. The partial separation to propranolol hidroxi 4 was perceivably more discharge and to acid naphthyloxylactic was perceivably lower in ccsme that PMs. EnantiomersOf both enantiómeros of propranolol the S-enantiómero blocks the adrenérgicos receivers beta. In the normal subjects that they received oral doses of propranolol racémico, the concentrations of the S-enantiómero exceeded those the R-enantiómero by 40-90% as a result of hepatic metabolism stereoselective. The special farmacinética of PediatricThe of the populations of InnoPran XL has not been investigated in patients underneath 18& #160; years of age. The farmacinética of GeriatricThe de InnoPran XL has not been investigated in patient on 65& #160; years of age. In a study of 12 majors (62-79 years) and of 12 (25-33 years) young healthy subjects, the separation of the S-enantiómero of propranolol was diminished in the old ones. In addition, the period of the r and the S-propranolol a study of the dose-proportionality was prolonged in the old ones compared with the young people (11 hours against GenderIn, the farmacinética of InnoPran XL was evaluated in 22& #160; man and 14& #160; feminine healthy volunteers. After single doses under conditions of fasting, the maximum AUC and bad C were near 49% and 16% more above for the females through the range of the dosage. The bad period of the elimination was longer in females than in the men (11 hours against the study of RaceA lead in 12 13 of the African-American white masculine subjects and that they take propranolol, demonstrated that in of stationary state, the separation of the r and the S-propranolol were near 76% and 53% more above in African-Americans than in targets, respectively. The renal farmacinética of InsufficiencyThe de InnoPran XL has not been evaluated in patients with the renal shortage. In a study lead in 5 patients with chronic renal lack, 6 healthy patients in regular dialysis, and 5 subjects, that they received a single oral dose of magnesium 40 of propranolol, the concentrations principles of the plasma (maximum C) of propranolol in the chronic group of the renal lack were 2 three higher times (161& #177; 41 ng/ml) that those observed in the dialysis patients (47& #177; 9 ng/ml) and in the healthy subjects (26& #177; 1 ng/ml). The separation of the plasma of propranolol also was reduced in the patients with chronic renal lack. The chronic renal lack has been associated to a diminution of the metabolism of the drug via down the regulation of the hepatic activity of the P450 cytochrome. The hepatic farmacinética of InsufficiencyThe de InnoPran XL has not been evaluated in patients with the hepatic weakening. Nevertheless, propranolol is metabolizado extensively by the liver. In a study lead in 7 patients with healthy cirrhosis and 9 subjects that they received propranolol oral of magnesium 80 every 8 hours for 7 doses, the concentration untied of stationary state of propranolol in patients with cirrhosis was increased three times with respect to controls. In cirrhosis, the period increased to 11 hours compared to 4 hours (it sees the PRECAUTIONS). Interactions of the drug interactions with the substrata, inhibitors or the inducers of propranolol of the cytochrome P-450 EnzymesBecause; #8217; the metabolism of s implies multiple ways in the system of the P-450 cytochrome (CYP2D6, 1A2, 2C19), the administration of InnoPran XL with the drugs that are metabolizan close, or affects the activity (induction or inhibition) of one or more of these ways it can take clinical drug interactions to the excellent (it sees the DRUG INTERACTIONS under PRECAUTIONS). The substrata or the inhibitors of the levels of CYP2D6Blood and/or the toxicity of propranolol can be increased in the administration of InnoPran XL with the substrata or inhibitors of CYP2D6, such as amiodarona, cimetidine, delavudin, fluoxetine, paroxetine, quinidina, and be ritonavir. It was not observed any interactions with ranitidine or lansoprazole. The substrata or the inhibitors of the levels of CYP1A2Blood and/or the toxicity of propranolol can be increased in the administration of InnoPran XL with the substrata or inhibitors of CYP1A2, such as imipramine, cimetidine, ciprofloxacin, fluvoxamine, isoniacida, be ritonavir, teofilina, zileuton, zolmitriptan, and rizatriptan. The substrata or the inhibitors of the levels of CYP2C19Blood and/or the toxicity of propranolol can be increased in the administration of InnoPran XL with the substrata or inhibitors of CYP2C19, such as fluconazole, cimetidine, fluoxetine, fluvoxamine, teniposide, and tolbutamide. Any interaction with omeprazole was not observed. The inducers of the hepatic levels of MetabolismBlood of the drug of propranolol can be diminished by the administration of InnoPran XL with the inducers such as rifampin and ethanol. Tobacco addiction also induces hepatic metabolism and has been demonstration to increase until 100% the separation of propranolol, giving by you are

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