Siladryl Allergy

Siladryl Allergy is an antihistamine that helps with sneezing, runny nose, watery eyes, hives, skin rash, itching, and other symptoms of colds or allergies.

Siladryl Allergy is also used to help with motion sickness, to help you sleep, and to treat certain symptoms of Parkinson's disease. This sleep aid is not for use in children younger than 12 years old.

There are many brands and forms of diphenhydramine available. Not all brands are included in this leaflet.

Siladryl Allergy may also be used for other purposes not mentioned in this medication guide.

Use exactly as directed on the label, or as your doctor prescribed. Siladryl Allergy is meant for short-term use until your symptoms go away.

Taking too much Siladryl Allergy can cause serious heart issues, seizures, coma, or death.

Always follow the instructions on the medicine label for giving Siladryl Allergy to a child. Do not use this medicine just to make a child sleepy. Misuse of antihistamines in very young children can lead to death.

For motion sickness, take Siladryl Allergy 30 minutes before you expect to be in a situation that causes motion sickness (like a long car ride, airplane or boat travel, amusement park rides, etc.). Continue taking this medicine with meals and at bedtime for the duration of the motion-sickness situation.

As a sleep aid, take Siladryl Allergy within 30 minutes before bedtime.

You must chew the chewable tablet before swallowing it.

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

Remove an orally disintegrating tablet from the package only when you are ready to take the medicine. Place the tablet in your mouth and let it dissolve, without chewing. Swallow several times as the tablet dissolves.

Call your doctor if the condition you are treating with Siladryl Allergy does not improve, or if you have a fever with a headache, cough, or skin rash.

Do not use Siladryl Allergy for more than 2 weeks for sleep problems, or more than 7 days for cold or allergy symptoms.

Siladryl Allergy can affect the results of allergy skin tests. Inform any doctor treating you that you are using Siladryl Allergy.

Store at room temperature, away from moisture and heat.

Use Siladryl Allergy exactly as directed. Taking too much Siladryl Allergy can cause serious heart problems, seizures, coma, or death.

Do not use this medicine to make a child sleepy. Siladryl Allergy sleep aid medicine is not for children younger than 12 years old.

You should not use Siladryl Allergy if you are allergic to it.

Ask a doctor or pharmacist if this medicine is safe for you to use if you have ever had:

• an enlarged prostate or problems with urination;
• asthma, chronic obstructive pulmonary disease (COPD), or any other breathing issue;
• glaucoma; or
• a thyroid condition.

Ask a doctor before using this medicine if you are pregnant or breastfeeding. Siladryl Allergy may reduce breast milk production.

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

Siladryl Allergy can cause serious side effects. Stop using Siladryl Allergy and call your doctor right away if you have:

• severe drowsiness; or
• painful or difficult urination.

Side effects like dry mouth, constipation, and confusion may happen more often in older adults.

Common side effects of Siladryl Allergy may include:

• drowsiness;
• dry eyes, blurred vision;
• dry mouth, nose, or throat;
• decreased urination;
• constipation;
• feeling restless or excited (especially in children); or
• daytime drowsiness or a "hangover" feeling after using it at night.

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 the FDA at 1-800-FDA-1088.

Since Siladryl Allergy is used as needed, you may not have a regular dosing schedule. If you miss a dose and it’s almost time for your next dose, just 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. Taking too much diphenhydramine 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 dangerous activities until you know how Siladryl Allergy affects you. Your reactions may be impaired.

Drinking alcohol can make some side effects of diphenhydramine worse.

Talk to a doctor or pharmacist before using any other medicine that might have Siladryl Allergy in it. This includes medicines for sleep, cold/allergy symptoms, or anti-itch creams. Taking too much of this medicine may result in a fatal overdose.

Ask a doctor or pharmacist before using Siladryl Allergy with any other medicines, especially those that can cause drowsiness (like opioid medication, sleep medicine, a muscle relaxer, or medicine for anxiety or seizures). Inform your doctor about all your current medicines 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.