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Dicel

Generic name: chlorpheniramine and pseudoephedrine

Brand names: Allerest Maximum Strength, LoHist-D, SudoGest Sinus and Allergy, Dicel, Histex, Triaminic Cold and Allergy, Triaminic Softchew Cold and Allergy, Triaminic Softchews Allergy Nose and Congestion

Used for nasal congestion
Last updated November 2, 2026 0 views
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What is Dicel?

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

Pseudoephedrine is a decongestant that helps shrink the blood vessels in the nasal passages. When blood vessels are enlarged, it can lead to nasal congestion (a stuffy nose).

Dicel is a combination medicine that treats symptoms of the common cold or seasonal allergies, such as sneezing, runny or stuffy nose, and itchy, watery eyes.

Dicel may also be used for other reasons that are not listed in this medication guide.

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How should I take Dicel?

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. Cold medicine is usually taken only for a short time until your symptoms clear up.

Do not give this medication to a child younger than 4 years old. 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.

You should not use antihistamine medication to make a child sleepy.

The chewable tablet must be chewed before swallowing.

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

If you need surgery, tell the surgeon ahead of time if you have taken a cold medicine within the past few days.

Call your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache, cough, or skin rash.

This medication can cause unusual results with allergy skin tests. Tell any doctor who treats you that you are taking an antihistamine.

Store at room temperature away from moisture and heat.

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Warnings

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.

You should not use antihistamine medication to make a child sleepy.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

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

You should not use this medication if you are allergic to chlorpheniramine or pseudoephedrine.

Ask a doctor or pharmacist if it is safe for you to take this medicine if you have:

  • asthma or COPD, cough with mucus, or cough caused by smoking, emphysema, or chronic bronchitis;
  • a blockage in your stomach or intestines;
  • kidney or liver disease;
  • high blood pressure, heart disease, coronary artery disease, or recent heart attack;
  • enlarged prostate or urination problems;
  • glaucoma;
  • diabetes;
  • epilepsy or other seizure disorder;
  • pheochromocytoma (an adrenal gland tumor);
  • overactive thyroid; or
  • if you take potassium (Cytra, Epiklor, K-Lyte, K-Phos, Kaon, Klor-Con, Polycitra, Urocit-K).

It is not known whether Dicel will harm an unborn baby. Do not use this medicine without your doctor's advice if you are pregnant.

It is not known whether chlorpheniramine and pseudoephedrine pass into breast milk or if it could harm a nursing baby. Antihistamines and decongestants may slow breast milk production. Do not use this medicine without your doctor's advice if you are breast-feeding a baby.

Artificially sweetened liquid medicine may contain phenylalanine. Check the medication label if you have phenylketonuria (PKU).

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Dicel side effects

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

This medicine may cause serious side effects. Stop using this medicine and call your doctor right away if you have:

  • chest pain, rapid pulse, fast or uneven heart rate;
  • confusion, hallucinations, severe nervousness;
  • tremor, seizure (convulsions);
  • little or no urinating;
  • easy bruising or bleeding, unusual weakness; or
  • dangerously high blood pressure (severe headache, buzzing in your ears, anxiety, shortness of breath).

Side effects such as dry mouth, constipation, and confusion may be more likely in older adults.

Common side effects of Dicel may include:

  • dizziness, drowsiness, blurred vision;
  • dry nose or mouth;
  • nausea, stomach pain, constipation, loss of appetite;
  • problems with memory or concentration; or
  • feeling restless or excited (especially in children).

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.

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What happens if I miss a dose?

Since cold medicine is taken as needed, you might not have a set schedule for doses. If you are taking the medication regularly and forget a dose, take it as soon as you remember. If it is nearly time for your next dose, skip the missed dose. Do not take extra medicine to compensate for the missed dose.

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What happens if I overdose?

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

This medication may affect your thinking or reactions. Be cautious if you drive or do anything that requires you to be alert.

Drinking alcohol with this medicine can lead to side effects.

Ask a doctor or pharmacist before using any other cold, allergy, or sleep medicine. Many combination medicines contain chlorpheniramine or pseudoephedrine. Taking certain products together can lead to getting too much of this medicine. Check the label to see if a medicine has an antihistamine or decongestant.

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What other drugs will affect Dicel?

Ask a doctor or pharmacist before using Dicel if you are taking any other drugs, including prescription and over-the-counter medicines, vitamins, and herbal products. Some medicines can cause unwanted or dangerous effects when used together. Not all possible interactions are listed in this medication guide.

Taking this medicine with other drugs that make you sleepy or slow your breathing can make these effects worse. Ask your doctor before taking Dicel with a sleeping pill, narcotic pain medicine, muscle relaxer, or medicine for anxiety, depression, or seizures.

This section was rewritten for readability and reviewed for meaning.

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.