C.P.M.

C.P.M. is an antihistamine that helps lessen the effects of histamine, a natural chemical in the body. Histamine can cause symptoms like sneezing, itching, watery eyes, and a runny nose.

C.P.M. is used to treat a runny nose, sneezing, itching, and watery eyes that are caused by allergies, the common cold, or the flu.

C.P.M. may also be used for reasons not mentioned in this medication guide.

Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. C.P.M. is usually taken only for a short time until your symptoms clear up.

Do not take for longer than 7 days in a row. Talk with your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache or skin rash.

Do not crush, chew, or break an extended-release tablet. Swallow it whole. Breaking the pill may cause too much of the drug to be released at one time.

Measure liquid medicine with a special dose-measuring spoon or medicine cup, not with a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one.

Always ask a doctor before giving a cough or cold medicine to a child. Death can occur from the misuse of cough and cold medicines in very young children.

If you need surgery or medical tests, tell the surgeon or doctor ahead of time if you have taken this medicine within the past few days.

Store at room temperature away from moisture and heat. Do not allow the liquid form of this medicine to freeze.

Always ask a doctor before giving cough or cold medicine to a child. Death can happen from misusing cough and cold medicines in very young children.

You should not use C.P.M. if you have narrow-angle glaucoma, a blockage in your stomach or intestines, an enlarged prostate, if you cannot urinate, or if you are having an asthma attack.

You should not use C.P.M. if you are allergic to it, or if you have:

• narrow-angle glaucoma;
• a blockage in your stomach or intestines;
• an enlarged prostate;
• if you are unable to urinate; or
• if you are having an asthma attack.

Ask a doctor or pharmacist if it is safe for you to take C.P.M. if you have:

• a blockage in your digestive tract (stomach or intestines), a colostomy or ileostomy;
• liver or kidney disease;
• asthma or COPD, cough with mucus, or cough caused by smoking, emphysema, or chronic bronchitis;
• high blood pressure, heart disease, coronary artery disease, or recent heart attack;
• epilepsy or other seizure disorder;
• urination problems;
• pheochromocytoma (an adrenal gland tumor); or
• overactive thyroid.

FDA pregnancy category B. C.P.M. is not expected to harm an unborn baby. Do not use this medicine without your doctor's advice if you are pregnant.

Chlorpheniramine may pass into breast milk and may harm a nursing baby. Antihistamines may also slow breast milk production. Do not use this medicine without your doctor's advice if you are breast-feeding a baby.

Artificially sweetened cold medicine may contain phenylalanine. If you have phenylketonuria (PKU), check the medication label to see if the product contains phenylalanine.

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

Stop using C.P.M. and call your doctor right away if you have:

• fast or uneven heart rate;
• mood changes;
• tremor, seizure (convulsions);
• easy bruising or bleeding, unusual weakness;
• feeling short of breath; or
• little or no urinating.

Common side effects of C.P.M. may include:

• dizziness, drowsiness;
• dry mouth, nose, or throat;
• constipation;
• blurred vision; or
• feeling nervous or restless.

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.

Since this medicine is taken as needed, you might not have a regular dosing schedule. If you are taking the medicine regularly and miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose. Do not take extra medicine to compensate for the missed dose.

Seek emergency medical help or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include severe versions of some of the side effects listed in this medication guide.

C.P.M. may cause blurred vision or affect your thinking or reactions. Be cautious if you drive or do anything that requires you to be alert and see clearly.

Drinking alcohol can increase certain side effects of chlorpheniramine.

Ask a doctor or pharmacist before using any other cold, cough, allergy, or sleep medicine. Antihistamines are found in many combination medicines. Taking certain products together can lead to getting too much of a specific drug. Check the label to see if a medicine contains an antihistamine.

Avoid getting overheated or dehydrated during exercise and in hot weather. C.P.M. can reduce sweating, which may make you more susceptible to heat stroke.

Taking C.P.M. with other medications that cause sleepiness or slow your breathing can make these effects worse. Talk to your doctor before using this medicine with a sleeping pill, narcotic pain reliever, muscle relaxer, or medication for anxiety, depression, or seizures.

Check with a doctor or pharmacist before using this medicine if you are taking any other drugs, including prescription and over-the-counter medications, vitamins, and herbal products. Some medications can lead to unwanted or dangerous effects when taken together. Not all possible interactions are mentioned in this medication guide.