Chlorpheniramine was felt to be the cause. Cardiovascularįrequency not reported: Palpitations, tachycardia, arrhythmias, hypotension OcularĬommon (1% to 10%): Blurred vision Gastrointestinalįrequency not reported: Vomiting, abdominal pain, diarrhea, dyspepsia Hypersensitivityįrequency not reported: Allergic reaction, angioedema, anaphylactic reactions Dermatologicįrequency not reported: Exfoliative dermatitis, rash, urticaria, photosensitivity Otherįrequency not reported: Tinnitus, chest tightness Psychiatricįrequency not reported: Confusion, excitation, irritability, nightmares, depression Hematologicįrequency not reported: Hemolytic anemia, blood dyscrasias Ī fatal case of agranulocytosis has been reported in a patient taking chlorpheniramine, pseudoephedrine, acetaminophen, dextromethorphan, phenylpropanolamine, and aspirin. Haloperidol was successful in relieving symptoms. Some of these cases were only partially relieved by discontinuation of the drug. This drowsiness may subside in some patients with extended use.įew cases of dyskinesias and tremors, often of the face, have been reported in patients whose chronic use of chlorpheniramine extended over a period of 3 to 10 years. Nearly all patients treated with chlorpheniramine experience drowsiness. Very common (10% or more): Sedation, somnolenceĬommon (1% to 10%): Disturbance in attention, abnormal coordination, dizziness, headache Īpplies to chlorpheniramine: compounding powder, injectable solution, oral capsule extended release, oral liquid, oral suspension extended release, oral syrup, oral tablet, oral tablet chewable, oral tablet extended release. You may report side effects to the FDA at 1-80. If you have questions about side effects, call your doctor. These are not all of the side effects that may occur. It has been prescribed for peripheral nervous system disorders, such as lum-bosciatalgia, diabetic or alcoholic polyneuropathy, or trigeminal neuralgia. Help if any of these side effects or any other side effects bother you or do not go away: However, many people have no side effects or only have minor side effects. Tightness in the chest or throat trouble breathing, swallowing, or talking unusual hoarseness or swelling of the mouth, face, lips, tongue,Īll drugs may cause side effects.
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