ChlorTan

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include severe forms of some of the side effects listed in this medication guide.

Applies to chlorpheniramine: oral liquid, oral syrup, oral tablet, oral tablet extended release

Applies 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

Nervous system

Central nervous system side effects have included depression resulting in drowsiness in 75% or more of treated patients. Dyskinesias have rarely been reported following chronic use of chlorpheniramine (the active ingredient contained in ChlorTan) [Ref]

Nearly all patients treated with chlorpheniramine experience drowsiness. This drowsiness may subside in some patients with extended use.

Few 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. Some of these cases were only partially relieved by discontinuation of the drug. Haloperidol was successful in relieving symptoms.[Ref]

Gastrointestinal

Gastrointestinal side effects have included dry mouth and constipation in up to one-third of treated patients.[Ref]

Cardiovascular

Cardiovascular side effects have included hypotension, tachycardia, and palpitations.[Ref]

Ocular

Ocular side effects of chlorpheniramine (the active ingredient contained in ChlorTan) may include blurred vision, diplopia, and dry eyes due to anticholinergic effects.[Ref]

Genitourinary

Genitourinary side effects have included dysuria, urinary hesitancy, and a decreased urine flow. In rare cases, the anticholinergic effect of chlorpheniramine (the active ingredient contained in ChlorTan) has precipitated acute urinary retention.[Ref]

Hematologic

Hematologic side effects have included 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. Chlorpheniramine was felt to be the cause.[Ref]

Some side effects of ChlorTan may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.