acetaminophen, caffeine, and dihydrocodeine

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Pronunciation: a SEET a MIN oh fen, KAF een, dye HYE droe KOE deen

Brand: Trezix

What is the most important information I should know about acetaminophen, caffeine, and dihydrocodeine?

You should not use this medicine if you have a stomach condition called paralytic ileus, or severe or uncontrolled asthma. Do not take more than your recommended dose. Acetaminophen overdose can damage your liver or cause death.

Do not use this medicine if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, or tranylcypromine.

This medicine is not approved for use by anyone younger than 18 years old.

Stop taking this medicine and call your doctor right away if you have skin redness or a rash that spreads and causes blistering and peeling.

What is acetaminophen, caffeine, and dihydrocodeine?

Acetaminophen is a pain reliever that increases the effects of dihydrocodeine.

Caffeine is a central nervous system stimulant. It relaxes muscle contractions in blood vessels to improve blood flow.

Dihydrocodeine is an opioid pain medication, sometimes called a narcotic.

Acetaminophen, caffeine, and dihydrocodeine is a combination medicine used to relieve moderate to severe pain.

Acetaminophen, caffeine, and dihydrocodeine may also be used for purposes not listed in this medication guide.

What should I discuss with my healthcare provider before taking acetaminophen, caffeine, and dihydrocodeine?

You should not use this medicine if you are allergic to acetaminophen (Tylenol) or dihydrocodeine, or if you have:

  • severe or uncontrolled asthma; or
  • a stomach condition called paralytic ileus.

Do not use acetaminophen, caffeine, and dihydrocodeine if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, and tranylcypromine.

This medicine is not approved for use by anyone younger than 18 years old.

To make sure this medicine is safe for you, tell your doctor if you have ever had:

  • liver disease, cirrhosis, or if you drink alcohol;
  • sleep apnea or other breathing disorders;
  • kidney disease;
  • a head injury or brain tumor;
  • epilepsy or other seizure disorder;
  • low blood pressure;
  • abnormal curvature of the spine that affects breathing;
  • a stomach or intestinal disorder;
  • problems with your pancreas, thyroid, or adrenal gland;
  • enlarged prostate, urination problems; or
  • alcoholism, drug addiction, or mental illness.

If you use dihydrocodeine while you are pregnant, your baby could become dependent on the drug. This can cause life-threatening withdrawal symptoms in the baby after it is born. Babies born dependent on habit-forming medicine may need medical treatment for several weeks.

Do not breast-feed while taking codeine/tramadol. This medicine can pass into breast milk and cause drowsiness, breathing problems, or death in a nursing baby.

How should I take acetaminophen, caffeine, and dihydrocodeine?

Follow all directions on your prescription label. Never take this medicine in larger amounts, or for longer than prescribed. An overdose can damage your liver or cause death. Tell your doctor if the medicine seems to stop working as well in relieving your pain.

Dihydrocodeine may be habit-forming. Never share this medicine with another person. MISUSE OF NARCOTIC MEDICINE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH, especially in a child or other person using the medicine without a prescription.

If you need surgery or medical tests, tell the doctor ahead of time that you are using this medicine.

Do not stop using this medicine suddenly after long-term use, or you could have unpleasant withdrawal symptoms. Ask your doctor how to safely stop using the medicine.

Store at room temperature away from moisture and heat. Keep track of your medicine. Dihydrocodeine is a drug of abuse and you should be aware if anyone is using your medicine improperly or without a prescription.

Do not keep leftover opioid medication. Just one dose can cause death in someone using this medicine accidentally or improperly. Ask your pharmacist where to locate a drug take-back disposal program. If there is no take-back program, flush the unused medicine down the toilet.

What happens if I miss a dose?

Since this medicine is used for pain, you are not likely to miss a dose. Skip any missed dose if it is almost time for your next scheduled dose. Do not use extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose can be fatal, especially in a child or other person using the medicine without a prescription.

Overdose symptoms may include extreme drowsiness or insomnia, tremors, fast heart rate, pinpoint pupils, severe muscle weakness, vomiting, loss of appetite, stomach pain, dark urine, seizure (convulsions), blue lips, very slow breathing, or coma.

What should I avoid while taking acetaminophen, caffeine, and dihydrocodeine?

Do not drink alcohol. Dangerous side effects or death could occur.

This medication may impair your thinking or reactions. Avoid driving or operating machinery until you know how acetaminophen, caffeine, and dihydrocodeine will affect you. Dizziness or severe drowsiness can cause falls or other accidents.

Ask a doctor or pharmacist before using any other cold, allergy, pain, or sleep medication. Acetaminophen (sometimes abbreviated as APAP) is contained in many combination medicines. Taking certain products together can cause you to get too much acetaminophen which can lead to a fatal overdose.

What are the possible side effects of acetaminophen, caffeine, and dihydrocodeine?

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

In rare cases, acetaminophen may cause a severe skin reaction that can be fatal. This could occur even if you have taken acetaminophen in the past and had no reaction. Stop taking this medicine and call your doctor right away if you have skin redness or a rash that spreads and causes blistering and peeling. If you have this type of reaction, you should never again take any medicine that contains acetaminophen.

Like other narcotic medicines, dihydrocodeine can slow your breathing. Death may occur if breathing becomes too weak.

Call your doctor at once if you have:

  • shallow breathing, slow heartbeat;
  • fast or pounding heart rate, feeling light-headed, fainting;
  • confusion, hallucinations, unusual thoughts or behavior;
  • muscle twitching;
  • problems with urination;
  • severe constipation;
  • liver problems --nausea, upper stomach pain, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); or
  • low cortisol levels -- nausea, vomiting, loss of appetite, dizziness, worsening tiredness or weakness.

Seek medical attention right away if you have symptoms of serotonin syndrome, such as: agitation, hallucinations, fever, sweating, shivering, fast heart rate, muscle stiffness, twitching, loss of coordination, nausea, vomiting, or diarrhea.

Serious side effects may be more likely in older adults and those who are overweight, malnourished, or debilitated.

Long-term use of opioid medication may affect fertility (ability to have children) in men or women. It is not known whether opioid effects on fertility are permanent.

Common side effects include:

  • dizziness, drowsiness, tired feeling, headache;
  • nausea, vomiting, stomach pain, constipation;
  • sweating, itching; or
  • skin rash.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect acetaminophen, caffeine, and dihydrocodeine?

This medicine can interact with many other drugs and cause dangerous side effects or death. Be sure your doctor knows if you also use:

  • other narcotic medications --opioid pain medicine or prescription cough medicine;
  • a sedative like Valium --diazepam, alprazolam, lorazepam, Ativan, Klonopin, Restoril, Tranxene, Versed, Xanax, and others;
  • drugs that make you sleepy or slow your breathing --a sleeping pill, muscle relaxer, tranquilizer, antidepressant, or antipsychotic medicine; or
  • drugs that affect serotonin levels in your body --stimulant medicine or medicine for depression, Parkinson's disease, migraine headaches, serious infections, or prevention of nausea and vomiting.

This list is not complete. Other drugs may interact with acetaminophen, caffeine, and dihydrocodeine, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Where can I get more information?

Your pharmacist can provide more information about acetaminophen, caffeine, and dihydrocodeine.


Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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