Dimetapp Nighttime Cold & Congestion

Diphenhydramine is an antihistamine. Phenylephrine is a decongestant.

Dimetapp Nighttime Cold & Congestion is a combination medicine used to treat a runny or stuffy nose, sneezing, itching, watery eyes, and sinus congestion caused by allergies, the common cold, or the flu.

Dimetapp Nighttime Cold & Congestion 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. Cold or cough medicine is only for short-term use.

Always follow directions on the medicine label about giving cough or cold medicine to a child. Do not use the medicine only to make a child sleepy. Death can occur from the misuse of cough or cold medicines in very young children.

Ask a doctor before giving the medicine to a child.

Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).

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.

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

Store at room temperature away from moisture and heat.

Do not use Dimetapp Nighttime Cold & Congestion if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine, among others.

Use this medicine exactly as instructed. Taking too much diphenhydramine can cause serious heart issues, seizures, coma, or death.

Do not use this medicine to make a child sleepy. Consult a doctor before giving the medicine to a child younger than 6 years old.

Check with a doctor or pharmacist before using any other medicine that may have diphenhydramine. Taking too much of this medicine can lead to a fatal overdose.

Do not use Dimetapp Nighttime Cold & Congestion if you have taken an MAO inhibitor in the last 14 days. This could lead to a dangerous drug interaction. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine, among others.

Ask a doctor or pharmacist if it is safe for you to use Dimetapp Nighttime Cold & Congestion if you have ever had:

• asthma or COPD, cough with mucus, or cough caused by smoking, emphysema, or chronic bronchitis;
• high blood pressure or heart disease;
• an enlarged prostate or problems urinating;
• glaucoma;
• diabetes; or
• a thyroid disorder.

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

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

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

Stop using Dimetapp Nighttime Cold & Congestion and call your doctor right away if you have:

• severe drowsiness;
• sleeplessness;
• painful or difficult urination;
• fast, pounding, or uneven heartbeats;
• trouble breathing;
• anxiety, nervousness;
• a seizure; or
• problems with balance or speech.

Common side effects of Dimetapp Nighttime Cold & Congestion may include:

• dizziness, drowsiness, headache;
• dry mouth, nose, or throat;
• nausea, vomiting, constipation;
• blurred vision; or
• trouble sleeping.

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 Dimetapp Nighttime Cold & Congestion is taken as needed, you might not have a regular dosing schedule. If you miss a dose and it’s nearly time for your next dose, just skip the missed dose. Do not take two doses at once.

Seek emergency medical help or call the Poison Help line at 1-800-222-1222. Taking too much diphenhydramine and phenylephrine can be deadly.

Signs of an overdose may include vomiting, confusion, extreme drowsiness, ringing in your ears, no urination, very dry eyes and mouth, dilated pupils, fast heartbeats, tremors, agitation, hallucinations, or seizures.

Do not drive or engage in activities that could be dangerous until you know how Dimetapp Nighttime Cold & Congestion affects you. Your reactions might be impaired.

Ask a doctor or pharmacist before using any other medicine that may contain diphenhydramine. This includes medicines for sleep, cold/allergy symptoms, or anti-itch treatments for the skin. Taking too much diphenhydramine can result in a fatal overdose.

Drinking alcohol while using this medicine can lead to side effects.

Ask a doctor or pharmacist before using Dimetapp Nighttime Cold & Congestion with any other medicines, especially those that can make you sleepy (like opioid medication, sleep medicine, a muscle relaxer, or medicine for anxiety or seizures). Inform your doctor about all the medicines you are currently taking and any medicine you begin or stop using. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.