Pentoxil Side Effects
Generic name: pentoxifylline
Medically reviewed by Drugs.com. Last updated on Feb 1, 2022.
Note: This document contains side effect information about pentoxifylline. Some of the dosage forms listed on this page may not apply to the brand name Pentoxil.
For the Consumer
Applies to pentoxifylline: oral tablet extended release
Side effects requiring immediate medical attention
Along with its needed effects, pentoxifylline (the active ingredient contained in Pentoxil) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor as soon as possible if any of the following side effects occur while taking pentoxifylline:
- Chest pain
- irregular heartbeat
Signs and symptoms of overdose (in the order in which they may occur)
- unusual excitement
- convulsions (seizures)
Side effects not requiring immediate medical attention
Some side effects of pentoxifylline may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
For Healthcare Professionals
Applies to pentoxifylline: compounding powder, oral tablet extended release
Pentoxifylline (the active ingredient contained in Pentoxil) has been generally well tolerated. While typically minor, side effects have necessitated discontinuation of the drug in approximately 3% of treated patients. Tolerance to mild side effects generally has developed with continued use.[Ref]
Gastrointestinal side effects have been the most common side effects associated with pentoxifylline (the active ingredient contained in Pentoxil) therapy and have included dyspepsia, nausea, vomiting, and belching, which occurred in 1% to 3% of patients. Some smaller studies have reported gastrointestinal disturbance in up to 33% of patients treated with pentoxifylline.[Ref]
Nervous system side effects have occurred in 1% to 2% of treated patients and have included headache, dizziness, insomnia, and tremor. Some smaller studies have reported nervous system adverse effects in up to 17% of treated patients. In addition, rare cases of visual and auditory hallucinations have been reported. Aseptic meningitis has been reported in postmarketing experiences.[Ref]
Cardiovascular side effects have included reports of palpitations, flushing, and angina. These reports have usually been associated with higher doses of an immediate release capsule which is not available in the United States.[Ref]
Hepatic side effects have included postmarketing reports of cholestasis.
More about Pentoxil (pentoxifylline)
- Drug interactions
- Dosage information
- During pregnancy or Breastfeeding
- Drug images
- Drug class: miscellaneous coagulation modifiers
Related treatment guides
1. "Product Information. Trental (pentoxifylline)." Hoechst Marion Roussel (2001):
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7. Green RM, McNamara J "The effects of pentoxifylline on patients with intermittent claudication." J Vasc Surg 7 (1988): 356-62
8. Baker DE, Campbell RK "Pentoxifylline: a new agent for intermittent claudication." Drug Intell Clin Pharm 19 (1985): 345-8
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10. Gilbert GJ "Pentoxifylline-induced musical hallucinations." Neurology 43 (1993): 1621-2
11. Mass RD, Venook AP, Linker CA, Zipkin RE "Pentoxifylline and aplastic anemia." Ann Intern Med 107 (1987): 427-8
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.