Chlorpheniramine is an antihistamine. It blocks the effects of histamine in the body. Chlorpheniramine prevents sneezing; itchy, watery eyes and nose; and other symptoms of allergies and colds. Codeprex is a combination of chlorpheniramine and codeine.

Codeprex is used to treat nasal congestion and coughs associated with allergies and the common cold.

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  • Codeprex
  • Incidence not known
    Acid or sour stomach
    anxiety
    belching
    bloating
    blurred or loss of vision
    chills
    cold clammy skin
    cold sweats
    confusion
    dark colored urine
    depression
    diarrhea
    difficult or painful urination
    disturbed color perception
    dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
    double vision
    dryness or spasm of the throat
    feeling of constant movement of self or surroundings
    fever
    halos around lights
    headache
    heartburn
    increased hunger
    indigestion
    irregular, fast or slow, or shallow breathing
    loss of appetite
    nausea
    nervousness
    night blindness
    nightmares
    overbright appearance of lights
    pain or discomfort in the chest, upper stomach, or throat
    pain in the stomach, side, or abdomen, possibly radiating to the back
    pale or blue lips, fingernails, or skin
    pressure in the stomach
    pounding in the ears
    seizures
    sensation of spinning
    shakiness
    sleepiness or unusual drowsiness
    slow, fast, or irregular heartbeat
    slurred speech
    stomach discomfort, upset, or pain
    sweating
    tunnel vision
    unusual tiredness or weakness
    vomiting
    yellow eyes or skin
    Severity: Minor
    Some of the side effects that can occur with chlorpheniramine / codeine may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

    Incidence not known
    Anxiety
    blistering, crusting, or irritation of the skin
    continuing ringing or buzzing or other unexplained noise in the ears
    cracked, dry, scaly skin
    dry mouth
    early menstrual periods
    face is warm or hot to touch
    false or unusual sense of well-being
    general feeling of discomfort or illness
    hearing loss
    hiccups
    increased appetite
    increased in sexual ability, desire, drive, or performance
    increased interest in sexual intercourse
    irritability
    lack or loss of strength
    redness of the face
    restlessness
    skin rash, itching, redness, hives, swelling
    swelling of the breasts or breast soreness in both females and males
    trouble sleeping
    twitching, twisting, uncontrolled repetitive movements of the tongue, lips, face, arms, or legs
    watering of eyes
  • (codeine polistirex and chlorpheniramine polistirex) extended-release suspension