Treats cough, nasal congestion, and discomfort caused by an upper respiratory infection.
There may be other brand names for this medicine.
When This Medicine Should Not Be Used
You should not use this medicine if you have had an allergic reaction to any of the ingredients. You should not use this medicine if you are also using an MAO inhibitor (MAOI) such as Eldepryl®, Marplan®, Nardil®, or Parnate®. You should not use this medicine if you have heart disease, high blood pressure, diabetes, or an overactive thyroid. You should not use this medicine if you have a certain type of brain tumor, head injury, or a medical condition that causes increased pressure in your head (such as hydrocephalus). You should not use this medicine if you have trouble breathing.
How to Use This Medicine
- Your doctor will tell you how much of this medicine to use and how often. Do not use more medicine or use it more often than your doctor tells you to.
- Drink plenty of fluids to help avoid constipation.
If a dose is missed:
- If you miss a dose or forget to use your medicine, use it as soon as you can. If it is almost time for your next dose, wait until then to use the medicine and skip the missed dose. Do not use extra medicine to make up for a missed dose.
How to Store and Dispose of This Medicine
- Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep all medicine away from children and never share your medicine with anyone.
- Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
- Make sure your doctor knows if you are using indomethacin (Indocin®) or methyldopa (Aldomet®). Tell your doctor if you are using a beta-blocker medicine such as atenolol, metoprolol (Toprol®), or propranolol (Inderal®). Beta-blocker medicines are often used to treat migraines, heart problems, or high blood pressure.
- Tell your doctor if you are using any medicines that make you sleepy. These include sleeping pills, cold and allergy medicine, narcotic pain relievers, and sedatives.
- While taking this medicine, do not also use other medicines that contain acetaminophen (Tylenol®). You may be getting more than a safe amount of this medicine.
- Do not drink alcohol while you are using this medicine. Tell your doctor if you drink alcohol on a regular basis.
Warnings While Using This Medicine
- Make sure your doctor knows if you are pregnant or breast feeding or if you have a history of asthma or serious lung disease, such as emphysema (COPD). Make sure your doctor knows if you have a history of mental or emotional problems, or if you have had a problem with misusing drugs in the past.
- This medicine may be habit-forming. If you feel that the medicine is not working as well, do not use more than your prescribed dose. Call your doctor for instructions.
- Make sure any doctor or dentist who treats you knows that you are using this medicine. This medicine may interact with certain drugs given during a procedure or surgery, such as anesthesia (sleeping or relaxing medicine), or pain medicine.
- This medicine may hide the warning signs of certain serious medical conditions. Do not use this medicine if you are having abdominal (belly) pain, or have had a recent head injury, unless your doctor says it is okay.
- This medicine may make you dizzy or drowsy. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert.
- This medicine may cause constipation. This is more common if you use it for a long time. Ask your doctor if you should also use a laxative to prevent and treat constipation.
Possible Side Effects While Using This Medicine
Call your doctor right away if you notice any of these side effects:
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Extreme weakness.
- Confusion, hallucinations (seeing things that are not there), or fainting.
- New or worsening fever.
- Shallow breathing.
- Sudden or severe headache.
- Tremors (shaking).
- Trouble urinating, or feeling like you have a full bladder even after you urinate.
If you notice these less serious side effects, talk with your doctor:
- Anxiety or other mood changes that are bothersome to you.
- Blurred vision.
- Nausea and vomiting.