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Isosorbide Mononitrate (Isosorbide Mononitrate)

Trade Name : Isosorbide Mononitrate

Actavis Pharma, Inc.

TABLET

Strength 20 mg/1

ISOSORBIDE MONONITRATE Nitrate Vasodilator [EPC],Nitrates [CS],Vasodilation [PE]

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GNH India is WHO GDP and ISO 9001 2015 Certified Pharmaceutical Wholesaler/ Supplier/ Exporters/ Importer from India of Isosorbide Mononitrate (Isosorbide Mononitrate) which is also known as Isosorbide Mononitrate and Manufactured by Actavis Pharma, Inc.. It is available in strength of 20 mg/1 per ml. Read more

Isosorbide Mononitrate (Isosorbide Mononitrate) is supplied for Tenders/ Emergency imports/ Un - licensed, Specials, Orphan drug/ Name patient line/ RLD supplies/ Reference listed drugs/ Comparator Drug/ Bio-Similar/ Innovator samples For Clinical trials.  Click to know price.     Read less

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We deliver your medicines through a validated cold chain shipment process. This process is used as these medicines need to manufactured, transported and stored at very specific temperatures, utilizing thermal and refrigerated packaging methods.

We deliver your medicines through a validated cold chain shipment process. This process is used as these medicines need to manufactured, transported and stored at very specific temperatures, utilizing thermal and refrigerated packaging methods.

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  • No data
  • Isosorbide mononitrate (diluted), USP, an organic nitrate, is a vasodilator with effects on both arteries and veins. The molecular formula is CHNO and the molecular weight is 191.14. The chemical name for isosorbide mononitrate is 1,4:3,6-Dianhydro-D-glucitol 5-nitrate and the compound has the following structural formula:
  • Isosorbide mononitrate tablets, USP, for oral administration, contain 10 mg or 20 mg of isosorbide mononitrate (diluted), USP. In addition, each tablet contains the following inactive ingredients: calcium stearate, colloidal silicon dioxide, corn starch, FD&C Blue #1HT Aluminum Lake, lactose monohydrate, microcrystalline cellulose, and talc.
  • Isosorbide mononitrate is the major active metabolite of isosorbide dinitrate (ISDN), and most of the clinical activity of the dinitrate is attributable to the mononitrate.
  • The principal pharmacological action of isosorbide mononitrate is relaxation of vascular smooth muscle and consequent dilation of peripheral arteries and veins, especially the latter. Dilatation of the veins promotes peripheral pooling of blood and decreases venous return to the heart, thereby reducing left ventricular end-diastolic pressure and pulmonary capillary wedge pressure (preload). Arteriolar relaxation reduces systemic vascular resistance, systolic arterial pressure, and mean arterial pressure (afterload). Dilatation of the coronary arteries also occurs. The relative importance of preload reduction, afterload reduction and coronary dilatation remains undefined.
  • Pharmacodynamics
  • Dosing regimens for most chronically used drugs are designed to provide plasma concentrations that are continuously greater than a minimally effective concentration. This strategy is inappropriate for organic nitrates. Several well-controlled clinical trials have used exercise testing to assess the antianginal efficacy of continuously-delivered nitrates. In the large majority of these trials, active agents were indistinguishable from placebo after 24 hours (or less) of continuous therapy. Attempts to overcome tolerance by dose escalation, even to doses far in excess of those used acutely, have consistently failed. Only after nitrates have been absent from the body for several hours has their antianginal efficacy been restored.
  • The drug-free interval sufficient to avoid tolerance to isosorbide mononitrate has not been completely defined. In the only regimen of twice-daily isosorbide mononitrate that has been shown to avoid development of tolerance, the two doses of isosorbide mononitrate tablets are given 7 hours apart, so there is a gap of 17 hours between the second dose of each day and the first dose of the next day. Taking account of the relatively long half-life of isosorbide mononitrate this result is consistent with those obtained for other organic nitrates.
  • The asymmetric twice-daily regimen of isosorbide mononitrate tablets successfully avoided significant rebound/withdrawal effects. The incidence and magnitude of such phenomena have appeared, in studies of other nitrates, to be highly dependent upon the schedule of nitrate administration.
  • Pharmacokinetics
  • Isosorbide mononitrate is rapidly and completely absorbed from the gastrointestinal tract. In humans, isosorbide mononitrate is not subject to first pass metabolism in the liver. The absolute bioavailability of isosorbide mononitrate from u00a0isosorbide mononitrate tablets is nearly 100%. Peak plasma concentrations usually occur in about 30 to 60 minutes. Isosorbide mononitrate exhibits dose proportionality over the recommended dose range. Food does not significantly affect the absorption or bioavailability of isosorbide mononitrate. Metoprolol coadministration did not change the pharmacokinetics of isosorbide mononitrate. The volume of distribution is approximately 0.6 L/kg. Plasma protein binding of isosorbide mononitrate was found to be less than 5%.
  • When radiolabelled isosorbide mononitrate was administered to humans in order to elucidate the metabolic fate, about half of the dose was found denitrated and renally excreted as isosorbide and sorbitol. One quarter of the dose was accounted for as conjugates of the parent drug in the urine. None of these metabolites is vasoactive. Only 2% of the dose was excreted as unchanged drug.
  • The overall elimination half-life of isosorbide mononitrate is about 5 hours. The rate of clearance is the same in healthy young adults, in patients with various degrees of renal, hepatic or cardiac dysfunction and in the elderly. When radiolabelled, isosorbide mononitrate was administered to humans, 93% of the dose was excreted within 48 hours into the urine. Renal excretion was virtually complete after 5 days; fecal excretion amounted to only 1% of the dose.
  • Isosorbide mononitrate has no known effect on renal and hepatic function. In patients with varying degrees of renal failure, dosage adjustment does not appear necessary. In patients with liver cirrhosis, the pharmacokinetic parameters after a single dose of isosorbide mononitrate were similar to the values found in healthy volunteers.
  • Isosorbide mononitrate is significantly removed from the blood during hemodialysis; however, an additional dose to compensate for drug lost is not necessary. In patients undergoing continuous ambulatory peritoneal dialysis, blood levels are similar to patients not on dialysis.
  • Clinical Trials
  • The acute and chronic antianginal efficacy of isosorbide mononitrate has been confirmed in clinical trials. The clinical efficacy of isosorbide mononitrate was studied in 21 stable angina pectoris patients. After single dose administration of isosorbide mononitrate, 20 mg, the exercise capacity was increased by 42.7% after one hour, 29.6% after 6 hours, and by 25% after eight hours when compared to placebo. Controlled trials of single doses of isosorbide mononitrate tablets have demonstrated that antianginal activity is present about 1 hour after dosing, with peak effect seen from 1 to 4 hours after dosing.
  • In one multicenter placebo-controlled trial, isosorbide mononitrate was found to be safe and effective during acute and chronic (3 weeks) treatment of angina pectoris. Two hundred fourteen (214) patients were enrolled in the trial; 54 patients were randomized to receive placebo and 106 patients were randomized to receive 10 or 20 mg of isosorbide mononitrate twice daily seven hours apart. The largest effect of isosorbide mononitrate, compared to placebo, was on day one u2014 dose one. Although 14 hours after the first dose of day 14, the increase in exercise tolerance due to isosorbide mononitrate was statistically significant, the increase was about half of that seen 2 hours after the first dose of day one. On day 21, two hours after the first dose the effect of isosorbide mononitrate was 60 to 70% of that seen on day one.
  • Isosorbide mononitrate tablets, USPu00a0are indicated for the prevention and treatment of angina pectoris due to coronary artery disease. The onset of action of oral isosorbide mononitrate is not sufficiently rapid for this product to be useful in aborting an acute anginal episode.
  • Isosorbide mononitrate is contraindicated in patients who are allergic to it.
  • Do not use isosorbide mononitrate in patients who are taking certain drugs for erectile dysfunction (phosphodiesterase inhibitors), such as sildenafil, tadalafil, or vardenafil. Concomitant use can cause severe hypotension, syncope, or myocardial ischemia.
  • Do not use isosorbide mononitrate in patients who are taking the soluble guanylate cyclase stimulator riociguat. Concomitant use can cause hypotension.
  • Amplification of the vasodilatory effects of isosorbide mononitrate by sildenafil can result in severe hypotension. The time course and dose dependence of this interaction have not been studied. Appropriate supportive care has not been studied, but it seems reasonable to treat this as a nitrate overdose, with elevation of the extremities and with central volume expansion.
  • The benefits of isosorbide mononitrate in patients with acute myocardial infarction or congestive heart failure have not been established. Because the effects of isosorbide mononitrate are difficult to terminate rapidly, this drug is not recommended in these settings.
  • If isosorbide mononitrate is used in these conditions, careful clinical or hemodynamic monitoring must be used to avoid the hazards of hypotension and tachycardia.
  • No data
  • Headache is the most frequent side effect and was the cause of 2% of all dropouts from controlled-clinical trials. Headache decreased in incidence after the first few days of therapy.
  • The following table shows the frequency of adverse reactions observed in 1% or more of subjects in 6 placebo-controlled trials, conducted in the United States and abroad. The same table shows the frequency of withdrawal for these adverse reactions. In many cases the adverse reactions were of uncertain relation to drug treatment.
  • Other adverse reactions, each reported by fewer than 1% of exposed patients, and in many cases of uncertain relation to drug treatment, were:
  • Cardiovascular: tacute myocardial infarction, apoplexy, arrhythmias, bradycardia, edema, hypertension, hypotension, pallor, palpitations, tachycardia.
  • Dermatologic: tsweating.
  • Gastrointestinal: tanorexia, dry mouth, dyspepsia, thirst, vomiting, decreased weight.
  • Genitourinary: tprostatic disorder.
  • Miscellaneous: tamblyopia, back pain, bitter taste, muscle cramps, neck pain, paresthesia, susurrus aurium.
  • Neurologic: ttanxiety, impaired concentration, depression, insomnia, nervousness, ttttnightmares, restlessness, tremor, vertigo.
  • Respiratory: ttasthma, dyspnea, sinusitis.
  • Extremely rarely, ordinary doses of organic nitrates have caused methemoglobinemia in normal-seeming patients; for further discussion of its diagnosis and treatment see under .
  • To report SUSPECTED ADVERSE REACTIONS, contact Actavis at 1-800-432-8534 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
  • Hemodynamic Effects
  • The ill effects of isosorbide mononitrate overdose are generally the results of isosorbide mononitrateu2019s capacity to induce vasodilatation, venous pooling, reduced cardiac output, and hypotension. These hemodynamic changes may have protean manifestations, including increased intracranial pressure, with any or all of persistent throbbing headache, confusion, and moderate fever; vertigo; palpitations; visual disturbances; nausea and vomiting (possibly with colic and even bloody diarrhea); syncope (especially in the upright posture); air hunger and dyspnea, later followed by reduced ventilatory effort; diaphoresis, with the skin either flushed or cold and clammy; heart block and bradycardia; paralysis; coma; seizures and death.
  • Laboratory determinations of serum levels of isosorbide mononitrate and its metabolites are not widely available, and such determinations have, in any event, no established role in the management of isosorbide mononitrate overdose.
  • There are no data suggesting what dose of isosorbide mononitrate is likely to be life-threatening in humans. In rats and mice, there is significant lethality at oral doses of 1965 mg/kg and 2581 mg/kg, respectively.
  • No data are available to suggest physiological maneuvers (e.g., maneuvers to change the pH of the urine) that might accelerate elimination of isosorbide mononitrate. Isosorbide mononitrate is significantly removed from the blood during hemodialysis.
  • No specific antagonist to the vasodilator effects of isosorbide mononitrate is known, and no intervention has been subject to controlled study as a therapy of isosorbide mononitrate overdose. Because the hypotension associated with isosorbide mononitrate overdose is the result of venodilatation and arterial hypovolemia, prudent therapy in this situation should be directed toward an increase in central fluid volume. Passive elevation of the patientu2019s legs may be sufficient, but intravenous infusion of normal saline or similar fluid may also be necessary.
  • The use of epinephrine or other arterial vasoconstrictors in this setting is likely to do more harm than good.
  • In patients with renal disease or congestive heart failure, therapy resulting in central volume expansion is not without hazard. Treatment of isosorbide mononitrate overdose in these patients may be subtle and difficult, and invasive monitoring may be required.
  • Methemoglobinemia
  • Methemoglobinemia has been reported in patients receiving other organic nitrates, and it probably could also occur as a side effect of isosorbide mononitrate. Certainly nitrate ions liberated during metabolism of isosorbide mononitrate can oxidize hemoglobin into methemoglobin. Even in patients totally without cytochrome b reductase activity, however, and even assuming that the nitrate moiety of isosorbide mononitrate is quantitatively applied to oxidation of hemoglobin, about 2 mg/kg of isosorbide mononitrate should be required before any of these patients manifests clinically significant (greater than or equal tou00a010%) methemoglobinemia. In patients with normal reductase function, significant production of methemoglobin should require even larger doses of isosorbide mononitrate. In one study in which 36 patients received 2 to 4 weeks of continuous nitroglycerin therapy at 3.1 to 4.4 mg/hr (equivalent, in total administered dose of nitrate ions, to 7.8 to 11.1 mg of isosorbide mononitrate per hour), the average methemoglobin level measured was 0.2%; this was comparable to that observed in parallel patients who received placebo.
  • Notwithstanding these observations, there are case reports of significant methemoglobinemia in association with moderate overdoses of organic nitrates. None of the affected patients had been thought to be unusually susceptible.
  • Methemoglobin levels are available from most clinical laboratories. The diagnosis should be suspected in patients who exhibit signs of impaired oxygen delivery despite adequate cardiac output and adequate arterial pO. Classically, methemoglobinemic blood is described as chocolate brown, without color change on exposure to air.
  • When methemoglobinemia is diagnosed, the treatment of choice is methylene blue, 1 to 2 mg/kg intravenously.
  • The recommended regimen of isosorbide mononitrate tablets is 20 mg twice daily, with the doses seven hours apart. A starting dose of 5 mg (u00bd tablet of the 10 mg dosing strength) might be appropriate for persons of particularly small stature but should be increased to at least 10 mg by the second or third day of therapy. Dosage adjustments are not necessary for elderly patients or patients with altered hepatic or renal function.
  • As noted above (), multiple studies of organic nitrates have shown that maintenance of continuous 24-hour plasma levels results in refractory tolerance. The asymmetric (2 doses, 7 hours apart) dosing regimen for isosorbide mononitrate tablets provides a daily nitrate-free interval to minimize the development of tolerance.
  • As also noted under , well-controlled studies have shown that tolerance to isosorbide mononitrate tablets occurs to some extent when using the twice-daily regimen in which the two doses are given seven hours apart. This regimen has been shown to have antianginal efficacy beginning one hour after the first dose and lasting at least seven hours after the second dose. The duration (if any) of antianginal activity beyond fourteen hours has not been studied.
  • In clinical trials, isosorbide mononitrate has been administered in a variety of regimens and doses. Doses above 20 mg twice-a-day (with the doses seven hours apart) have not been adequately studied. Doses of 5 mg twice-a-day are clearly effective (effectiveness based on exercise tolerance) for only the first day of a twice-a-day (with doses 7 hours apart) regimen.
  • Isosorbide mononitrate tablets, USP are available as follows:
  • 10 mg u2014 Each blue, round, tablet imprinted with and 631 on one side and scored on the other side, contains 10 mg of isosorbide mononitrate (diluted), USP. Tablets are supplied in bottles of 100 (NDC 0228-2631-11).
  • 20 mg u2014 Each blue, round, tablet imprinted with and 620 on one side and scored on the other side, contains 20 mg of isosorbide mononitrate (diluted), USP. Tablets are supplied in bottles of 100 (NDC 0228-2620-11).
  • Dispense in tight containers as defined in the USP.
  • Store at 25u00baC (77u00baF); excursions permitted to 15u00ba to 30u00baC (59u00ba to 86u00baF). Keep tightly closed.
  • Manufactured by:Actavis Elizabeth LLCElizabeth, NJ 07207 USA
  • Distributed by:Actavis Pharma, Inc.Parsippany, NJ 07054 USA
  • 40-9190
  • Revised u2014 January 2015
  • NDC 0228--11
  • Isosorbide Mononitrate Tablets, USP 10 mg
  • 100 Tablets
  • Rx Only
  • Actavis
  • NDC 0228--11
  • Isosorbide Mononitrate Tablets, USP 20 mg
  • 100 Tablets
  • Rx Only
  • Actavis
  • Arrayn- Array

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