oseltamavir phosphate

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Overview

What is oseltamavir phosphate?

Oseltamivir phosphate capsules, USP an influenza neuraminidase inhibitor (NAI), is available as: • Capsules containing 30 mg, 45 mg, or 75 mg oseltamivir for oral use, in the form of oseltamivir phosphate USP. In addition to the active ingredient, each capsule contains croscarmellose sodium, isopropyl alcohol, povidone, pregelatinised starch, sodium stearyl fumarate and talc. The 30 mg capsule shell contains gelatin, iron oxide red, iron oxide yellow, titanium dioxide. The 45 mg capsule shell contains gelatin, iron oxide black, titanium dioxide. The 75 mg capsule shell contains gelatin, iron oxide red, iron oxide yellow, titanium dioxide, iron oxide black. Each capsule is printed with blue ink, which includes shellac, propylene glycol and FD&C Blue No. 2 as the colorant.

Oseltamivir phosphate, USP is a white crystalline solid with the chemical name (3R,4R,5S)-4-acetylamino-5-amino-3(1-ethylpropoxy)-1-cyclohexene-1-carboxylic acid, ethyl ester, phosphate (1:1). The chemical formula is CHNO (free base). The molecular weight is 312.4 for oseltamivir free base and 410.4 for oseltamivir phosphate salt. The structural formula is as follows:

What does oseltamavir phosphate look like?

What are the available doses of oseltamavir phosphate?

• Capsules: 30 mg, 45 mg, 75 mg ()

What should I talk to my health care provider before I take oseltamavir phosphate?

How should I use oseltamavir phosphate?

Oseltamivir phosphate capsule is indicated for the treatment of acute, uncomplicated illness due to influenza A and B infection in patients 2 weeks of age and older who have been symptomatic for no more than 48 hours.

Administer oseltamivir phosphate for the treatment of influenza in patients 2 weeks of age or older or for prophylaxis of influenza in patients 1 year and older using:

The capsules and oral suspension may be taken with or without food; however, tolerability may be enhanced if oseltamivir phosphate capsules is taken with food.

Adjust the oseltamivir phosphate dosage in patients with moderate or severe renal impairment

For patients who cannot swallow capsules, oseltamivir phosphate for oral suspension is the preferred formulation. When oseltamivir phosphate for oral suspension is not available from wholesaler or the manufacturer, oseltamivir phosphate capsules may be opened and mixed with sweetened liquids such as regular or sugar-free chocolate syrup, corn syrup, caramel topping, or light brown sugar (dissolved in water). During emergency situations when neither the oral suspension or the age-appropriate strengths of oseltamivir phosphate capsules to mix with sweetened liquids are available, then a pharmacist may prepare an emergency supply of oral suspension from oseltamivir phosphate capsules 75 mg [

What interacts with oseltamavir phosphate?

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What are the warnings of oseltamavir phosphate?

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What are the precautions of oseltamavir phosphate?

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What are the side effects of oseltamavir phosphate?

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What should I look out for while using oseltamavir phosphate?

Oseltamivir phosphate capsules are contraindicated in patients with known serious hypersensitivity to oseltamivir or any component of the product. Severe allergic reactions have included anaphylaxis and serious skin reactions including toxic epidermal necrolysis, Stevens-Johnson Syndrome, and erythema multiforme .

What might happen if I take too much oseltamavir phosphate?

Reports of overdoses with oseltamivir phosphate have been received from clinical trials and during postmarketing experience. In the majority of cases reporting overdose, no adverse reactions were reported. Adverse reactions reported following overdose were similar in nature to those observed with therapeutic doses of oseltamivir phosphate .

How should I store and handle oseltamavir phosphate?

StorageStore at 20°C to 25°C (68°F to 77°F); excursions permitted between 15°C and 30°C (59°F and 86°F) [See USP Controlled Room Temperature].StorageStore at 20°C to 25°C (68°F to 77°F); excursions permitted between 15°C and 30°C (59°F and 86°F) [See USP Controlled Room Temperature].Oseltamivir Phosphate Capsules, USP 75-mg capsules (75 mg free base equivalent of the phosphate salt): Light yellow cap and grey body size ‘2’ hard gelatin capsules containing white to off white granules with “75mg” on cap and “M55” on body imprinted with blue ink. Available in blister packages of 10 (NDC 68788-7106-1).Storage Store capsules at 20° to 25°C (68° to 77°F); excursions permitted within 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature]. Oseltamivir Phosphate Capsules, USP 75-mg capsules (75 mg free base equivalent of the phosphate salt): Light yellow cap and grey body size ‘2’ hard gelatin capsules containing white to off white granules with “75mg” on cap and “M55” on body imprinted with blue ink. Available in blister packages of 10 (NDC 68788-7106-1).Storage Store capsules at 20° to 25°C (68° to 77°F); excursions permitted within 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature]. Oseltamivir Phosphate Capsules, USP 75-mg capsules (75 mg free base equivalent of the phosphate salt): Light yellow cap and grey body size ‘2’ hard gelatin capsules containing white to off white granules with “75mg” on cap and “M55” on body imprinted with blue ink. Available in blister packages of 10 (NDC 68788-7106-1).Storage Store capsules at 20° to 25°C (68° to 77°F); excursions permitted within 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature]. Oseltamivir Phosphate Capsules, USP 75-mg capsules (75 mg free base equivalent of the phosphate salt): Light yellow cap and grey body size ‘2’ hard gelatin capsules containing white to off white granules with “75mg” on cap and “M55” on body imprinted with blue ink. Available in blister packages of 10 (NDC 68788-7106-1).Storage Store capsules at 20° to 25°C (68° to 77°F); excursions permitted within 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature].

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Clinical Information

Chemical Structure

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Clinical Pharmacology

Oseltamivir is an antiviral drug with activity against influenza virus

Non-Clinical Toxicology

Oseltamivir phosphate capsules are contraindicated in patients with known serious hypersensitivity to oseltamivir or any component of the product. Severe allergic reactions have included anaphylaxis and serious skin reactions including toxic epidermal necrolysis, Stevens-Johnson Syndrome, and erythema multiforme .

Furosemide may increase the ototoxic potential of aminoglycoside antibiotics, especially in the presence of impaired renal function. Except in life-threatening situations, avoid this combination.

Furosemide should not be used concomitantly with ethacrynic acid because of the possibility of ototoxicity.

Patients receiving high doses of salicylates concomitantly with furosemide, as in rheumatic disease, may experience salicylate toxicity at lower doses because of competitive renal excretory sites.

There is a risk of ototoxic effects if cisplatin and furosemide are given concomitantly. In addition, nephrotoxicity of nephrotoxic drugs such as cisplatin may be enhanced if furosemide is not given in lower doses and with positive fluid balance when used to achieve forced diuresis during cisplatin treatment.

Furosemide has a tendency to antagonize the skeletal muscle relaxing effect of tubocurarine and may potentiate the action of succinylcholine.

Lithium generally should not be given with diuretics because they reduce lithium's renal clearance and add a high risk of lithium toxicity.

Furosemide combined with angiotensin converting enzyme inhibitors or angiotensin II receptor blockers may lead to severe hypotension and deterioration in renal function, including renal failure. An interruption or reduction in the dosage of furosemide, angiotensin converting enzyme inhibitors, or angiotensin receptor blockers may be necessary.

Potentiation occurs with ganglionic or peripheral adrenergic blocking drugs.

Furosemide may decrease arterial responsiveness to norepinephrine. However, norepinephrine may still be used effectively.

Simultaneous administration of sucralfate and furosemide tablets may reduce the natriuretic and antihypertensive effects of furosemide. Patients receiving both drugs should be observed closely to determine if the desired diuretic and/or antihypertensive effect of furosemide is achieved. The intake of furosemide and sucralfate should be separated by at least two hours.

In isolated cases, intravenous administration of furosemide within 24 hours of taking chloral hydrate may lead to flushing, sweating attacks, restlessness, nausea, increase in blood pressure, and tachycardia. Use of furosemide concomitantly with chloral hydrate is therefore not recommended.

Phenytoin interferes directly with renal action of furosemide. There is evidence that treatment with phenytoin leads to decrease intestinal absorption of furosemide, and consequently to lower peak serum furosemide concentrations.

Methotrexate and other drugs that, like furosemide, undergo significant renal tubular secretion may reduce the effect of furosemide. Conversely, furosemide may decrease renal elimination of other drugs that undergo tubular secretion. High-dose treatment of both furosemide and these other drugs may result in elevated serum levels of these drugs and may potentiate their toxicity as well as the toxicity of furosemide.

Furosemide can increase the risk of cephalosporin-induced nephrotoxicity even in the setting of minor or transient renal impairment.

Concomitant use of cyclosporine and furosemide is associated with increased risk of gouty arthritis secondary to furosemide-induced hyperurecemia and cyclosporine impairment of renal urate excretion. High doses (>80 mg) of furosemide may inhibit the binding of thyroid hormones to carrier proteins and result in transient increase in free thyroid hormones, followed by an overall decrease in total thyroid hormone levels.

One study in six subjects demonstrated that the combination of furosemide and acetylsalicylic acid temporarily reduced creatinine clearance in patients with chronic renal insufficiency. There are case reports of patients who developed increased BUN, serum creatinine and serum potassium levels, and weight gain when furosemide was used in conjunction with NSAIDs.

Literature reports indicate that coadministration of indomethacin may reduce the natriuretic and antihypertensive effects of furosemide in some patients by inhibiting prostaglandin synthesis. Indomethacin may also affect plasma renin levels, aldosterone excretion, and renin profile evaluation. Patients receiving both indomethacin and furosemide should be observed closely to determine if the desired diuretic and/or antihypertensive effect of furosemide is achieved.

Cases of anaphylaxis and serious skin reactions including toxic epidermal necrolysis, Stevens-Johnson Syndrome, and erythema multiforme have been reported in postmarketing experience with oseltamivir phosphate capsules. Stop oseltamivir phosphate capsules and institute appropriate treatment if an allergic-like reaction occurs or is suspected. The use of oseltamivir phosphate capsules is contraindicated in patients with known serious hypersensitivity to oseltamivir phosphate .

The following serious adverse reactions are discussed below and elsewhere in the labeling: • Serious skin and hypersensitivity reactions [] • Neuropsychiatric events []

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Reference

This information is obtained from the National Institute of Health's Standard Packaging Label drug database.
"https://dailymed.nlm.nih.gov/dailymed/"

While we update our database periodically, we cannot guarantee it is always updated to the latest version.

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Professional

Clonazepam Description Each single-scored tablet, for oral administration, contains 0.5 mg, 1 mg, or 2 mg Clonazepam, USP, a benzodiazepine. Each tablet also contains corn starch, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and povidone. Clonazepam tablets USP 0.5 mg contain Yellow D&C No. 10 Aluminum Lake. Clonazepam tablets USP 1 mg contain Yellow D&C No. 10 Aluminum Lake, as well as FD&C Blue No. 1 Aluminum Lake. Chemically, Clonazepam, USP is 5-(o-chlorophenyl)-1,3-dihydro-7-nitro-2H-1,4-benzodiazepin-2-one. It is a light yellow crystalline powder. It has the following structural formula: C15H10ClN3O3 M.W. 315.72

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Interactions

A total of 440 drugs (1549 brand and generic names) are known to interact with Imbruvica (ibrutinib). 228 major drug interactions (854 brand and generic names) 210 moderate drug interactions (691 brand and generic names) 2 minor drug interactions (4 brand and generic names) Show all medications in the database that may interact with Imbruvica (ibrutinib).

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