Chlorphen-12 Allergy, made In The USA

Welcome Healthcare Professionals

This information is provided to patients and is available here as a reference for healthcare professionals.  For any further questions, please email us at

How should this medicine be used?

Chlorphen-12 comes as an extended-release (long-acting) tablet and is usually taken twice a day in the morning and evening as needed. Follow the directions on the package carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take Chlorphen-12 exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Check nonprescription cough and cold product labels carefully before using 2 or more products at the same time. These products may contain the same active ingredient(s) and taking them together could cause you to receive an overdose. This is especially important if you will be giving cough and cold medications to a child.

If you are giving Chlorphen-12 to a child, read the package label carefully to be sure that it is the right product for a child of that age. Before you give Chlorphen-12 to a child, check the package label to find out how much medication the child should receive. For children under 12 years, ask the doctor.

Swallow Chlorphen-12 tablets whole. Do not break, crush, chew, or open them.

Other uses for this medicine.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

What special precautions should I follow before taking Chlorphen-12?

  • Tell your doctor and pharmacist if you are allergic to Chlorpheniramine or any of the ingredients in Chlorphen-12. Check the package label for a list of the ingredients.
  • Tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: other medications for colds, hay fever, or allergies; medications for anxiety, depression, or seizures; muscle relaxants; narcotic medications for pain; sedatives; sleeping pills; and tranquilizers.
  • Tell your doctor if you have or have ever had asthma, emphysema, chronic bronchitis, or other types of lung disease; glaucoma (a condition in which increased pressure in the eye can lead to gradual loss of vision); ulcers; diabetes; difficulty urinating (due to an enlarged prostate gland); heart disease; high blood pressure; seizures; or an overactive thyroid gland.
  • Tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking Chlorphen-12, call your doctor.
  • If you are having surgery, including dental surgery, tell the doctor or dentist that you are taking Chlorphen-12.
  • You should know that this medication may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.
  • Ask your doctor about the safe use of alcohol while you are taking Chlorphen-12. Alcohol can make the side effects of Chlorphen-12 worse.

What special dietary instructions should I follow?

Unless your doctor tells you otherwise, continue your normal diet.

What should I do if I forget a dose?

Chlorphen-12 is usually taken as needed. If your doctor has told you to take Chlorphen-12 regularly, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

What side effects can this medication cause?

Chlorphen-12 may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  • Drowsiness
  • Dry mouth, nose, and throat
  • Nausea
  • Vomiting
  • Loss of appetite
  • Constipation
  • Headache
  • Increased chest congestion

Some side effects can be serious. If you experience any of the following symptoms, call your doctor immediately:

  • Vision problems
  • Difficulty urinating

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration’s (FDA) MedWatch Adverse Event Reporting program online or by phone [1-800-332-1088].

What storage conditions are needed for this medicine?

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

In case of emergency/overdose

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

What other information should I know?

Ask your pharmacist any questions you have about Chlorphen-12 or chlorpheniramine maleate.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.


+ when compared to Benadryl++
++ Benadryl is a registered trademark of its respective owner

Your patients can buy Chlorphen-12 online on this website, at,, or from any leading independent or chain drugstore.  If they have trouble, they can request their pharmacist to get the product from Cardinal, McKesson, AmeriSource Bergen or any other leading wholesaler where we ware available.