J-MAX DHC liquid

Generic Name: dihydrocodeine/guaifenesin (dye-HYE-droe-KOE-deen/gwye-FEN-e-sin)
Brand Name: J-MAX DHC

Some children have had serious and sometimes fatal breathing problems when using codeine after surgery to remove tonsils or adenoids. Talk with your doctor for more information.


J-MAX DHC liquid is used for:

Relieving symptoms of nasal congestion, cough, and throat and airway irritation due to colds, flu, or hay fever. It may also be used for other conditions as determined by your doctor.

J-MAX DHC liquid is a cough suppressant and expectorant combination. It works by loosening mucus and lung secretions in the chest, and making coughs more productive. The cough suppressant works in the brain to help decrease the cough reflex to reduce a dry cough.

Do NOT use J-MAX DHC liquid if:

  • you are allergic to any ingredient in J-MAX DHC liquid or any other codeine- or morphine-related medicine (eg, oxycodone)
  • you have severe high blood pressure, a rapid heartbeat, other severe heart problems (eg, heart blood vessel disease), narrow-angle glaucoma, stomach ulcer, difficulty urinating, severe bowel problems (eg, paralytic ileus), or severe asthma, or you are having an asthma attack
  • you are taking sodium oxybate (GHB) or you have taken furazolidone or a monoamine oxidase inhibitor (MAOI) (eg, phenelzine) within the last 14 days
  • the patient is a child and has just had surgery to remove tonsils or adenoids

Contact your doctor or health care provider right away if any of these apply to you.

Slideshow: OTC Medication Use In Pregnancy: Wise or Worrisome?

Before using J-MAX DHC liquid:

Some medical conditions may interact with J-MAX DHC liquid. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have had a severe allergic reaction (eg, severe rash, hives, difficulty breathing, dizziness) to morphine, codeine, or any other opiate (eg, hydrocodone, dihydrocodeine, oxycodone)
  • if you have a history of glaucoma, an enlarged prostate gland or other prostate problems, heart problems, diabetes, high or low blood pressure, low blood volume, blood vessel problems, stroke, adrenal gland problems (eg, Addison disease), pancreas problems (eg, pancreatitis), or an overactive thyroid
  • if you have a history of stomach problems, bowel problems (eg, chronic inflammation or ulceration of the bowel), gallbladder problems (eg, gallstones), a blockage of your bladder or bowel, or kidney or liver problems, or if you have had recent abdominal surgery
  • if you have a history of asthma or other breathing problems, chronic cough, lung problems (eg, chronic bronchitis, emphysema), or chronic obstructive pulmonary disease (COPD), or if your cough occurs with large amounts of mucus
  • if you have recently had any head injury, brain injury or tumor, increased pressure in the brain, infection of the brain or nervous system, epilepsy, or seizures
  • if you have a history of alcohol abuse, drug abuse, or suicidal thoughts or behavior; or if you are in poor health or are very overweight

Some MEDICINES MAY INTERACT with J-MAX DHC liquid. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Beta-blockers (eg, propranolol), cimetidine, HIV protease inhibitors (eg, ritonavir), MAOIs (eg, phenelzine), muscle relaxants (eg, cyclobenzaprine), opioid analgesics (eg, hydrocodone), or phenothiazines (eg, chlorpromazine) because the risk of side effects from J-MAX DHC liquid may be increased
  • Sodium oxybate (GHB) because the risk of severe drowsiness, breathing problems, seizures, irregular heartbeat, or heart attack may be increased
  • Naltrexone because it may decrease the effectiveness of J-MAX DHC liquid
  • Mecamylamine or methyldopa because their effectiveness may be decreased by J-MAX DHC liquid

This may not be a complete list of all interactions that may occur. Ask your health care provider if J-MAX DHC liquid may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use J-MAX DHC liquid:

Use J-MAX DHC liquid as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Take J-MAX DHC liquid by mouth with or without food.
  • Drink plenty of water while taking J-MAX DHC liquid.
  • Use a measuring device marked for medicine dosing. Ask your pharmacist for help if you are unsure of how to measure your dose.
  • If you miss a dose of J-MAX DHC liquid, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use J-MAX DHC liquid.

Important safety information:

  • J-MAX DHC liquid may cause drowsiness or dizziness. These effects may be worse if you take it with alcohol or certain medicines. Use J-MAX DHC liquid with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
  • J-MAX DHC liquid may cause dizziness, lightheadedness, or fainting; alcohol, hot weather, exercise, or fever may increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Sit or lie down at the first sign of any of these effects.
  • Do not drink alcohol or use medicines that may cause drowsiness (eg, muscle relaxers, sleep aids) while you are using J-MAX DHC liquid; it may add to their effects. Ask your pharmacist if you have questions about which medicines may cause drowsiness.
  • Do not use J-MAX DHC liquid for a cough with a lot of mucous. Do not use it for a long-term cough (eg, caused by asthma, emphysema, smoking). However, you may use it for these conditions if your doctor tells you to.
  • Do NOT take more than the recommended dose or use for longer than prescribed without checking with your doctor.
  • If your symptoms do not get better within 5 to 7 days or if they get worse, check with your doctor.
  • J-MAX DHC liquid may interfere with certain lab tests. Be sure your doctor and lab personnel know you are taking J-MAX DHC liquid.
  • Tell your doctor or dentist that you take J-MAX DHC liquid before you receive any medical or dental care, emergency care, or surgery.
  • Use J-MAX DHC liquid with caution in the ELDERLY; they may be more sensitive to its effects.
  • J-MAX DHC liquid should not be used in CHILDREN younger than 2 years old; safety and effectiveness in these children have not been confirmed.
  • PREGNANCY and BREAST-FEEDING: It is not known if J-MAX DHC liquid can cause harm to the fetus. If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using J-MAX DHC liquid while you are pregnant. It is not known if J-MAX DHC liquid is found in breast milk. Do not breast-feed while taking J-MAX DHC liquid.

Some people who use J-MAX DHC liquid for a long time may develop a need to continue taking it. People who take high doses are also at risk. This is known as DEPENDENCE or addiction.

If you stop taking J-MAX DHC liquid suddenly, you may have WITHDRAWAL symptoms. These may include anxiety, irregular heartbeat, irritability, restlessness, trouble sleeping, and unusual sweating.

Possible side effects of J-MAX DHC liquid:

All medicines may cause side effects, but many people have no, or minor side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Constipation; dizziness; drowsiness; excitability; headache; increased sweating; lightheadedness; nausea; nervousness or anxiety; tiredness; trouble sleeping; vomiting.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); confusion; difficulty urinating; fast or irregular heartbeat; hallucinations; mental or mood changes (eg, irritability); seizures; severe dizziness, lightheadedness, or headache; severe drowsiness; vision changes or blurred vision.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include blurred vision; cold and clammy skin; coma; confusion; hallucinations; seizures; severe dizziness, lightheadedness, or headache; severe drowsiness; unusually fast, slow, or irregular heartbeat; vomiting.

Proper storage of J-MAX DHC liquid:

Store J-MAX DHC liquid at room temperature, between 59 and 86 degrees F (15 and 30 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep J-MAX DHC liquid out of the reach of children and away from pets.

General information:

  • If you have any questions about J-MAX DHC liquid, please talk with your doctor, pharmacist, or other health care provider.
  • J-MAX DHC liquid is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take J-MAX DHC liquid or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about J-MAX DHC liquid. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to J-MAX DHC liquid. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using J-MAX DHC liquid.

Issue Date: April 2, 2014
Database Edition 14.2.1.001
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

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