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Allerhist-D Side Effects

Generic name: clemastine / phenylpropanolamine

Note: This document provides detailed information about Allerhist-D Side Effects associated with clemastine / phenylpropanolamine. Some dosage forms listed on this page may not apply specifically to the brand name Allerhist-D.

Applies to clemastine / phenylpropanolamine: oral tablet extended release.

Important warnings This medicine can cause some serious health issues

Phenylpropanolamine, an ingredient in this product, has been associated with an increased risk of hemorrhagic stroke (bleeding into the brain or into tissue surrounding the brain) in women.

Men may also be at risk.

Although the risk of hemorrhagic stroke is low, the U.S.

Food and Drug Administration (FDA) recommends that consumers not use any products that contain phenylpropanolamine.

Use caution when driving, operating machinery, or performing other hazardous activities. Clemastine and phenylpropanolamine may cause dizziness or drowsiness.

If you experience dizziness or drowsiness, avoid these activities.

Use alcohol cautiously.

Alcohol may increase drowsiness and dizziness while taking clemastine and phenylpropanolamine.

Do not take more of this medication than is recommended.

If your symptoms do not improve, or if they worsen, talk to your doctor.

Serious side effects are unlikely to occur. Stop taking clemastine and phenylpropanolamine and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives).

Other, less serious side effects may be more likely to occur. Continue to take clemastine and phenylpropanolamine and talk to your doctor or try another similar medication if you experience

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

For healthcare professionals

Applies to clemastine / phenylpropanolamine: oral tablet extended release.

Nervous system

Central nervous system depression has commonly been associated with the use of clemastine. This may result in drowsiness, dizziness, and headache. Dyskinesias have rarely been reported following chronic use of antihistamines. Phenylpropanolamine can stimulate the nervous system, resulting in tremor, anxiety, insomnia, dizziness, and nervousness. Headache has also been associated with the use of phenylpropanolamine.[Ref]

Nearly all patients treated with clemastine experience drowsiness, which may subside in some patients with extended use. Patients should be warned against driving, as well as concomitant ingestion of alcohol and other sedative-hypnotic drugs, while taking clemastine.

Few cases of dyskinesias and tremors, often of the face, have been reported in patients whose chronic use of antihistamines extended over a period of 3 to 10 years. Some of these cases were only partially relieved by discontinuation of the drug. Haloperidol was successful in relieving symptoms.

Seizures may occur in rare cases of hypertensive crisis due to phenylpropanolamine and have been reported with normally recommended doses as well as in cases of overuse or overdose.

There have been anecdotal reports of cerebrovascular hemorrhage largely associated with an uneven pattern of cerebrovascular spasm referred to as vascular beading. Vascular beading has also been reported in the absence of hemorrhage. Intracranial hemorrhage has almost always been associated with hypertension.[Ref]

Cardiovascular

Cardiovascular adverse effects may be associated with the use of phenylpropanolamine. Use of phenylpropanolamine can cause a significant rise in heart rate. Hypertension and arrhythmias may be problematic in susceptible patients. Cardiovascular effects of clemastine may include hypotension, tachycardia, and palpitations. Cardiovascular side effects have also included an increased risk of hemorrhagic stroke.[Ref]

Phenylpropanolamine causes vasoconstriction which usually does not result in blood pressure elevations in healthy adults given normally prescribed dosages. However, phenylpropanolamine administration may be problematic for patients with preexisting hypertension and those receiving higher dosages. In general, 75 mg of sustained-release phenylpropanolamine will not produce a significant increase in blood pressure in normotensive patients, but 150 mg of sustained-release phenylpropanolamine can.

The combination of caffeine and phenylpropanolamine is more apt to cause hypertension. Although caffeine is no longer added to phenylpropanolamine as an anorexiant, this combination is available as "look-alikes" for amphetamines. Hypertensive crisis has occurred occasionally subsequent to overusage, overdose, and ingestion of normally recommended doses. Hypertensive crisis may be accompanied by headache, blurred vision, confusion, intracranial hemorrhage, encephalopathy, or seizures.

Arrhythmias may be produced in predisposed patients. The majority of reports of arrhythmias involve overuse or overdose. Rarely, high doses of phenylpropanolamine may cause chest pain and evidence of myocardial injury.

One study reported that taking phenylpropanolamine increases the risk of hemorrhagic stroke in women. Men may also be at risk. Although the risk of hemorrhagic stoke is very low, the FDA recommends that all use of phenylpropanolamine be discontinued.[Ref]

Gastrointestinal

Gastrointestinal reactions from clemastine include dry mouth and constipation due to its anticholinergic effects and may occur in up to one-third of patients. Gastrointestinal complaints most commonly associated with phenylpropanolamine include anorexia and gastric irritation. Nausea and vomiting have occurred in conjunction with hypertensive episodes.[Ref]

Ocular

Ocular side effects of clemastine are primarily anticholinergic and may include blurred vision, diplopia, and dry eyes.[Ref]

Genitourinary

Genitourinary side effects include dysuria, urinary hesitancy, and decreased urine flow. These side effects are thought to be due to the anticholinergic effects of clemastine. In rare cases, use of clemastine can precipitate acute urinary retention.[Ref]

Hematologic

Hematologic side effects have been associated with the use of antihistamines and include bone marrow suppression, thrombocytopenia, and aplastic anemia.[Ref]

A fatal case of agranulocytosis has been reported in a patient taking chlorpheniramine, pseudoephedrine, acetaminophen, dextromethorphan, phenylpropanolamine, and aspirin. However, chlorpheniramine was felt to be the cause.[Ref]

Psychiatric

Psychiatric reactions to phenylpropanolamine occur infrequently but include acute mania, anxiety, paranoia, confusion, agitation, and hallucinations. These reactions may be more common in women.[Ref]

Psychotic reactions to phenylpropanolamine have occurred in patients receiving normally recommended doses and in cases of abuse. In a few patients, phenylpropanolamine appears to have exacerbated an underlying bipolar disorder which was previously undiagnosed.

A psychotic episode consisting of abnormal behavior was reported in a young woman following a week of therapy with Naldecon (phenylephrine, phenylpropanolamine, chlorpheniramine, and phenyltoloxamine) and amantadine. The patient had no personal or family history of psychiatric illness and no history of recreational substance use. It is uncertain whether the episode was due to the amantadine, the phenylpropanolamine or another component in the Naldecon, or an interaction between the drugs.[Ref]

Hypersensitivity

Hypersensitivity reactions to phenylpropanolamine have been reported.[Ref]

Renal

Renal side effects associated with the use of phenylpropanolamine include rare cases of acute interstitial nephritis.[Ref]

References

1. Thomas JS, Heurich AE, Ralph JW, Crane R, Shepherd DA (1977) "Double-blind, controlled study of clemastine fumarate, chlorpheniramine and placebo in patients with seasonal allergic rhinitis." Ann Allergy, 38, p. 169-74

2. (1976) "Letter: Dyskinesia associated with chronic antihistamine use." N Engl J Med, 294, p. 113

3. Thach BT, Chase TN, Bosma JF (1975) "Oral facial dyskinesia associated with prolonged use of antihistaminic decongestants." N Engl J Med, 293, p. 486-7

4. Schuller DE, Turkewitz D (1986) "Adverse effects of antihistamines." Postgrad Med, 79, p. 75-86

5. Frolund L, Etholm B, Irander K, Johannessen TA, Odkvist L, Ohlander B, Weeke B (1990) "A multicentre study of loratadine, clemastine and placebo in patients with perennial allergic rhinitis." Allergy, 45, p. 254-61

6. Kizer KW (1984) "Intracranial hemorrhage associated with overdose of decongestant containing phenylpropanolamine" Am J Emerg Med, 2, p. 180-1

7. Edwards M, Russo L, Harwood-Nuss A (1987) "Cerebral infarction with a single oral dose of phenylpropanolamine." Am J Emerg Med, 5, p. 163-4

8. Lake CR, Gallant S, Masson E, Miller P (1990) "Adverse drug effects attributed to phenylpropanolamine: a review of 142 case reports." Am J Med, 89, p. 195-208

9. Cornelius JR, Soloff PH, Reynolds CF, 3d (1984) "Paranoia, homicidal behavior, and seizures associated with phenylpropanolamine." Am J Psychiatry, 141, p. 120-1

10. Achor MB, Extein I (1981) "Diet aids, mania, and affective illness" Am J Psychiatry, 138, p. 392

11. Schaffer CB, Pauli MW (1980) "Psychotic reaction caused by proprietary oral diet agents." Am J Psychiatry, 137, p. 1256-7

12. Grieger TA, Clayton AH, Goyer PF (1990) "Affective disorder following use of phenylpropanolamine" Am J Psychiatry, 147, p. 367-8

13. Bernstein E, Diskant BM (1982) "Phenylpropanolamine: a potentially hazardous drug." Ann Emerg Med, 11, p. 311-5

14. Howrie DL, Wolfson JH (1983) "Phenylpropanolamine-induced hypertensive seizures." J Pediatr, 102, p. 143-5

15. Dietz AJ, Jr (1981) "Amphetamine-like reactions to phenylpropanolamine." JAMA, 245, p. 601-2

16. Norvenius G, Widerlov E, Lonnerholm G (1979) "Phenylpropanolamine and mental disturbances" Lancet, 2, p. 1367-8

17. Johnson DA, Etter HS, Reeves DM (1983) "Stroke and phenylpropanolamine use" Lancet, 2, p. 970

18. Elliott CF, Whyte JC (1981) "Phenylpropanolamine and hypertension." Med J Aust, 1, p. 715

19. Mueller SM (1983) "Neurologic complications of phenylpropanolamine use." Neurology, 33, p. 650-2

20. Maher LM, Peterson PL, Dela-Cruz C (1987) "Postpartum intracranial hemorrhage and phenylpropanolamine use" Neurology, 37, p. 1686

21. Kase CS, Foster TE, Reed JE, Spatz EL, Girgis GN (1987) "Intracerebral hemorrhage and phenylpropanolamine use." Neurology, 37, p. 399-404

22. Kikta DG, Devereaux MW, Chandar K (1985) "Intracranial hemorrhages due to phenylpropanolamine." Stroke, 16, p. 510-2

23. Lake CR, Tenglin R, Chernow B, Holloway HC (1983) "Psychomotor stimulant-induced mania in a genetically predisposed patient: a review of the literature and report of a case." J Clin Psychopharmacol, 3, p. 97-100

24. "Product Information. Tavist-D (clemastine-phenylpropanolamine)." Sandoz Pharmaceuticals Corporation

25. Schran HF, Petryk L, Chang CT, Oconnor R, Gelbert MB (1996) "The pharmacokinetics and bioavailability of clemastine and phenylpropanolamine in single-component and combination formulations." J Clin Pharmacol, 36, p. 911-22

26. Lake CR, Zaloga G, Bray J, Rosenberg D, Chernow B (1989) "Transient hypertension after two phenylpropanolamine diet aids and the effects of caffeine: a placebo-controlled follow-up study." Am J Med, 86, p. 427-32

27. Lake CR, Zaloga G, Clymer R, Quirk RM, Chernow B (1988) "A double dose of phenylpropanolamine causes transient hypertension." Am J Med, 85, p. 339-43

28. Kroenke K, Omori DM, Simmons JO, Wood DR, Meier NJ (1989) "The safety of phenylpropanolamine in patients with stable hypertension." Ann Intern Med, 111, p. 1043-4

29. Pentel PR, Mikell FL, Zavoral JH (1982) "Myocardial injury after phenylpropanolamine ingestion." Br Heart J, 47, p. 51-4

30. Horowitz JD, Lang WJ, Howes LG, Fennessy MR, Christophidis N, Rand MJ, Louis WJ (1980) "Hypertensive responses induced by phenylpropanolamine in anorectic and decongestant preparations." Lancet, 1, p. 60-1

31. McEwen J (1983) "Phenylpropanolamine-associated hypertension after the use of "over- the-counter" appetite-suppressant products." Med J Aust, 2, p. 71-3

32. Clark JE, Simon WA (1983) "Cardiac arrhythmias after phenylpropanolamine ingestion." Drug Intell Clin Pharm, 17, p. 737-8

33. Noble R (1988) "A controlled clinical trial of the cardiovascular and psychological effects of phenylpropanolamine and caffeine." Drug Intell Clin Pharm, 22, p. 296-9

34. O'Connell MB, Gross CR (1991) "The effect of multiple doses of phenylpropanolamine on the blood pressure of patients whose hypertension was controlled with beta blockers." Pharmacotherapy, 11, p. 376-81

35. O'Connell MB, Gross CR (1990) "The effect of single-dose phenylpropanolamine on blood pressure in patients with hypertension controlled by beta blockers." Pharmacotherapy, 10, p. 85-91

36. Chin C, Choy M (1993) "Cardiomyopathy induced by phenylpropanolamine." J Pediatr, 123, p. 825-7

37. Hardin AS (1988) "Chlorpheniramine and agranulocytosis ." Ann Intern Med, 108, p. 770

38. Eisner EV, LaBocki NL, Pinckney L (1975) "Chlorpheniramine-dependent thrombocytopenia." JAMA, 231, p. 735-6

39. Kanoh T, Jingami H, Uchino H (1977) "Aplastic anaemia after prolonged treatment with chlorpheniramine ." Lancet, 1, p. 546-7

40. Deringer PM, Maniatis A (1976) "Chlorpheniramine-induced bone-marrow suppression." Lancet, 1, p. 432

41. Stroe AE, Hall J, Amin F (1995) "Psychotic episode related to phenylpropanolamine and amantadine in a healthy female." Gen Hosp Psychiatry, 17, p. 457-8

42. Speer F, Carrasco LC, Kimura CC (1978) "Allergy to phenylpropanolamine." Ann Allergy, 40, p. 32-4

43. Singer DR, Simpson JG, Catto GR, Johnston AW (1988) "Drug hypersensitivity causing granulomatous interstitial nephritis." Am J Kidney Dis, 11, p. 357-9

44. Swenson RD, Golper TA, Bennett WM (1982) "Acute renal failure and rhabdomyolysis after ingestion of phenylpropanolamine-containing diet pills." JAMA, 248, p. 1216

More about Allerhist-D (clemastine / phenylpropanolamine)

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Further information

Allerhist-D side effects can vary depending on the individual. 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.