M-Hist PD

M-Hist PD is an antihistamine that helps treat sneezing, runny nose, itchy nose and throat, and itchy or watery eyes caused by allergies like hay fever.

M-Hist PD 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 until your symptoms clear up.

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.

You must chew the chewable tablet before you swallow it.

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, or if you have a fever, rash, or headaches.

If you need surgery or medical tests, tell the 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 liquid medicine to freeze.

Follow all directions on your medicine label and package. Inform each of your healthcare providers about all your medical conditions, allergies, and all medicines you are using.

You should not use antihistamines to make a child sleepy.

You should not use M-Hist PD if you are allergic to it.

Ask a doctor or pharmacist if M-Hist PD is safe to use if you have:

• a breathing disorder such as chronic bronchitis or emphysema;
• glaucoma; or
• an enlarged prostate and urination problems.

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

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

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

M-Hist PD can cause serious side effects. Stop using M-Hist PD and call your doctor right away if you experience:

• painful or difficult urination.

Common side effects of M-Hist PD may include:

• dizziness, drowsiness;
• blurred vision;
• dry mouth, nose, or throat;
• constipation;
• increased urination; or
• feeling nervous or restless (especially in children).

This is not a complete list of side effects, and others may happen. Call your doctor for medical advice about side effects. You can report side effects to FDA at 1-800-FDA-1088.

Since M-Hist PD is taken as needed, you might not follow a regular dosing schedule. If you miss a dose and it’s nearly time for your next dose, skip the missed dose. Do not take two doses at the same time.

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

Do not drive or engage in hazardous activities until you understand how M-Hist PD will affect you. Your reactions could be impaired.

Drinking alcohol can make some side effects of triprolidine worse.

Ask a doctor or pharmacist before using other cough or cold medicines that may have similar ingredients.

Do not become overheated or dehydrated during exercise and in hot weather. M-Hist PD can reduce sweating, and you may be more likely to suffer from heat stroke.

Do not use this medicine with other drugs that cause drowsiness or slow your breathing (such as opioid medicine, a muscle relaxer, or medicine for anxiety or seizures). Ask a doctor or pharmacist before using any other medication, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed in this medication guide.