Pentoxifylline
Generic Name: pentoxifylline
Brand Names:
Pentoxifylline
DESCRIPTION Pentoxifylline Extended-Release Tablets USP for oral administration contain 400 mg of the active drug and the following inactive ingredients: hypromellose, povidone, talc, magnesium stearate, maltodextrin, polyethylene glycol, titanium dioxide, triacetin, D&C yellow #10 aluminum lake and FD&C yellow #6 in an extended-release formulation.
Overview
DESCRIPTION Pentoxifylline Extended-Release Tablets USP for oral administration contain 400 mg of the active drug and the following inactive ingredients: hypromellose, povidone, talc, magnesium stearate, maltodextrin, polyethylene glycol, titanium dioxide, triacetin, D&C yellow #10 aluminum lake and FD&C yellow #6 in an extended-release formulation.
Uses
INDICATIONS AND USAGE Pentoxifylline Extended-Release Tablets are indicated for the treatment of patients with intermittent claudication on the basis of chronic occlusive arterial disease of the limbs. Pentoxifylline Extended-Release Tablets can improve function and symptoms but is not intended to replace more definitive therapy, such as surgical bypass, or removal of arterial obstructions when treating peripheral vascular disease.
Dosage
DOSAGE AND ADMINISTRATION The usual dosage of pentoxifylline in extended-release tablet form is one tablet (400 mg) three times a day with meals. While the effect of pentoxifylline may be seen within 2 to 4 weeks, it is recommended that treatment be continued for at least 8 weeks. Efficacy has been demonstrated in double-blind clinical studies of 6 months duration. Digestive and central nervous system side effects are dose related. If patients develop these effects it is recommended that the dosage be lowered to one tablet twice a day (800 mg/day). If side effects persist at this lower dosage, the administration of pentoxifylline should be discontinued. In patients with severe renal impairment (creatinine clearance below 30 mL/min) reduce dose to 400 mg once a day.
Side Effects
ADVERSE REACTIONS Clinical trials were conducted using either extended-release pentoxifylline tablets for up to 60 weeks or immediate-release pentoxifylline capsules for up to 24 weeks. Dosage ranges in the tablet studies were 400 mg bid to tid and in the capsule studies, 200 to 400 mg tid. The table summarizes the incidence (in percent) of adverse reactions considered drug related, as well as the numbers of patients who received extended-release pentoxifylline tablets, immediate-release pentoxifylline capsules, or the corresponding placebos. The incidence of adverse reactions was higher in the capsule studies (where dose related increases were seen in digestive and nervous system side effects) than in the tablet studies.
Interactions
Drug Interactions Bleeding has been reported in patients treated with pentoxifylline with or without concomitant NSAIDs, anticoagulants, or platelet aggregation inhibitors. Increased prothrombin time has been reported in patients concomitantly treated with pentoxifylline and vitamin K antagonists. Monitoring of anticoagulant activity in these patients is recommended when pentoxifylline is introduced or the dose is changed. Concomitant administration of pentoxifylline and theophylline-containing drugs leads to increased theophylline levels and theophylline toxicity in some individuals. Monitor theophylline levels when starting pentoxifylline or changing dose. Concomitant administration of strong CYP1A2 inhibitors (including e.g.
Warnings
CONTRAINDICATIONS Pentoxifylline Extended-Release Tablets should not be used in patients with recent cerebral and/or retinal hemorrhage or in patients who have previously exhibited intolerance to this product or methylxanthines such as caffeine, theophylline, and theobromine.
Pregnancy
Pregnancy Teratogenicity studies have been performed in rats and rabbits using oral doses up to 576 and 264 mg/kg, respectively. On a weight basis, these doses are 24 and 11 times the maximum recommended human daily dose (MRHD); on a body-surface-area basis, they are 4.2 and 3.5 times the MRHD. No evidence of fetal malformation was observed. Increased resorption was seen in rats of the 576 mg/kg group. There are no adequate and well controlled studies in pregnant women. Pentoxifylline should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.
Storage
HOW SUPPLIED Pentoxifylline Extended-Release Tablets USP, 400 mg are available for oral administration as yellow, oblong, film-coated tablets, embossed with “N668” on one side and plain on the other. They are supplied in bottles of 100 (NDC 70954-668-10) and bottles of 500 (NDC 70954-668-20). Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].
Frequently Asked Questions
What is Pentoxifylline used for?▼
INDICATIONS AND USAGE Pentoxifylline Extended-Release Tablets are indicated for the treatment of patients with intermittent claudication on the basis of chronic occlusive arterial disease of the limbs. Pentoxifylline Extended-Release Tablets can improve function and symptoms but is not intended to replace more definitive therapy, such as surgical bypass, or removal of arterial obstructions when treating peripheral vascular disease.
What are the side effects of Pentoxifylline?▼
ADVERSE REACTIONS Clinical trials were conducted using either extended-release pentoxifylline tablets for up to 60 weeks or immediate-release pentoxifylline capsules for up to 24 weeks. Dosage ranges in the tablet studies were 400 mg bid to tid and in the capsule studies, 200 to 400 mg tid. The table summarizes the incidence (in percent) of adverse reactions considered drug related, as well as the numbers of patients who received extended-release pentoxifylline tablets, immediate-release pentoxifylline capsules, or the corresponding placebos. The incidence of adverse reactions was higher in the capsule studies (where dose related increases were seen in digestive and nervous system side effects) than in the tablet studies.
Can I take Pentoxifylline during pregnancy?▼
Pregnancy Teratogenicity studies have been performed in rats and rabbits using oral doses up to 576 and 264 mg/kg, respectively. On a weight basis, these doses are 24 and 11 times the maximum recommended human daily dose (MRHD); on a body-surface-area basis, they are 4.2 and 3.5 times the MRHD. No evidence of fetal malformation was observed. Increased resorption was seen in rats of the 576 mg/kg group. There are no adequate and well controlled studies in pregnant women. Pentoxifylline should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.
What are the important warnings for Pentoxifylline?▼
CONTRAINDICATIONS Pentoxifylline Extended-Release Tablets should not be used in patients with recent cerebral and/or retinal hemorrhage or in patients who have previously exhibited intolerance to this product or methylxanthines such as caffeine, theophylline, and theobromine.
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Medical Disclaimer
This drug information is for educational purposes only and should not replace professional medical advice. Drug information is sourced from the FDA National Drug Code Directory and Structured Product Labeling. Always consult with a healthcare provider before starting, stopping, or changing any medication.