Dimetane Extentab Side Effects

Generic Name: brompheniramine

Note: This page contains information about the side effects of brompheniramine. Some of the dosage forms included on this document may not apply to the brand name Dimetane Extentab.

Not all side effects for Dimetane Extentab may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

For the Consumer

Applies to brompheniramine: chewable tablets, liquid, oral suspension

Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Anxiety; dizziness or lightheadedness; drowsiness; enlarged pupils; headache; loss of appetite; restlessness; sleeplessness; tension.

Seek medical attention right away if any of these SEVERE side effects occur while taking brompheniramine (the active ingredient contained in Dimetane Extentab)

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); blurred or double vision; chest pain; clumsiness or unsteadiness; convulsions; fast or irregular heartbeat; hallucinations; pounding in the chest; psychotic episodes (bizarre behavior); severe dry mouth, nose, or throat; shortness of breath; sore throat and fever; trouble urinating; unusual bleeding or bruising; unusual tiredness or weakness.

For Healthcare Professionals

Applies to brompheniramine: compounding powder, injectable solution, oral capsule, oral capsule extended release, oral liquid, oral suspension extended release, oral tablet, oral tablet chewable extended release, oral tablet extended release

Nervous system

Nervous system side effects have included central nervous system (CNS) depression, resulting in drowsiness and sedation in nearly 50% of patients treated. This effect has often been transient and ceased with continued use. Motor skills have be impaired and patients should be advised to avoid tasks which require attention. Patients should also avoid concomitant use with alcohol and other sedative-hypnotic drugs. Dyskinesias have rarely been reported following chronic use of brompheniramine (the active ingredient contained in Dimetane Extentab)

A few cases of dyskinesias and tremors, often of the face, have been reported in patients whose chronic use of brompheniramine extended over a period of up to 10 years. Some of these cases were only partially relieved by discontinuation of the drug. Haloperidol was successful in relieving symptoms in these patients. Spasmodic torticollis has been reported in a child given brompheniramine over an eight month period.

Gastrointestinal

Gastrointestinal side effects have include nausea, dry mouth and constipation.

Cardiovascular

Cardiovascular effects of brompheniramine (the active ingredient contained in Dimetane Extentab) have included hypotension, tachycardia, and palpitations.

Ocular

Ocular side effects have included blurred vision, diplopia, and dry eyes due to anticholinergic effects.

Genitourinary

Genitourinary side effects have included dysuria, urinary hesitancy, decrease in urine flow, and, in rare cases, acute urinary retention.

Hematologic

Hematologic side effects have included rare cases of hemolytic anemia, thrombocytopenia, and agranulocytosis.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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