Benadryl - Uses, Side Effects, Warnings, and More

Benadryl – Uses, Side Effects, Warnings, and More

Benadryl – Uses, Side Effects, Warnings, and More

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Antihistamines, including diphenhydramine, are used to treat a variety of conditions, including hay fever, allergies, and the common cold. These symptoms include a rash, itching, watery eyes, itchy eyes/nose/throat, cough, runny nose, and sneezing. Other symptoms include a runny nose and cough.

In addition to this, it can be used to treat and prevent motion sickness, which can produce nausea, vomiting, and dizziness. You can also take diphenhydramine to help you relax and get to sleep. This drug works by inhibiting the production of a certain naturally occurring substance (histamine) that your body produces in response to an allergic reaction. Its drying effects on symptoms such as watery eyes and runny nose are created by suppressing another natural molecule that is made by your body (acetylcholine). Cough and cold products have not been proven to be safe or helpful in children younger than 6 years old.

If your child is younger than six years old, do not give them this product to treat cold symptoms unless your pediatrician specifically instructs you to do so. When it comes to youngsters younger than 12 years old, the use of certain goods (such as long-acting tablets and capsules, for example) is not advised. Inquire with your physician or pharmacist for additional information on how to make safe use of the product you have purchased.

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These products do not cure or reduce the duration of the common cold, and they may cause serious adverse effects. If you carefully follow all of the dosing instructions, the likelihood of experiencing major adverse effects will be reduced. This product should not be given to a youngster in an attempt to put them to sleep.

Do not administer any other cough and cold remedies, especially if they include the same or comparable active components (see also Drug Interactions section). Inquire with your family physician or the pharmacist about alternative treatments for cough and cold symptoms, such as increasing your fluid intake, using a humidifier, or applying saline nasal drops or spray.

Benadryl: How to Take It

Always make sure to follow all of the instructions on the product’s packaging. If your physician has ordered this medication for you, make sure you take it exactly as prescribed. If you have any questions, you should consult with either your physician or your pharmacist.

Consume the pill, capsule, or liquid form of the medication by mouth, either with or without food. If you are taking this prescription in liquid form, you will need a special measuring instrument or spoon. You should not use a regular spoon since you run the risk of not getting the right amount. It is not necessary to measure the dose if you are using a form of this drug that is intended for single use (such as a single-dose whistle).

The strip or pill that dissolves quickly should be left to dissolve on the tongue for a few moments before being swallowed, either with or without water. Before swallowing, the chewable pills need to have a good deal of their substance chewed up.

Your age, current medical condition, and how well you respond to treatment all play a role in determining the appropriate dosage. There are a wide variety of brands and preparations of diphenhydramine that may be purchased. It is important to pay close attention to the dosing instructions included with each product because the quantity of diphenhydramine contained in each product may vary. Do not take this drug more frequently or raise your dose without first consulting your doctor.

Take your medication thirty minutes before beginning any activity that could cause motion sickness, such as traveling. Take your medication around half an hour before going to bed so that it can help you sleep. If you continue to have trouble sleeping for more than two weeks, you should make an appointment with your primary care physician.

If your situation does not improve or if it gets worse, you should let your doctor know.

Side Effects

It is possible to experience symptoms such as drowsiness, dizziness, constipation, stomach discomfort, blurred vision, or dry mouth, nose, or throat. Notify your doctor or pharmacist as soon as possible if any of these side effects continue or become worse.

If you suffer from dry mouth, you can alleviate the discomfort by sucking on sugar-free hard candies or ice chips, chewing sugar-free gum, drinking water, or using a saliva substitute.

If your physician has recommended that you take this drug, keep in mind that he or she has concluded that the potential benefits to you outweigh the potential risks. The majority of persons who take this medicine do not report experiencing any severe adverse effects.

Notify your physician as soon as possible if you experience any major adverse effects, such as changes in your mental state or mood (such as agitation or disorientation), difficulties urinating, or a rapid or irregular pulse.

In the event that you experience any very significant adverse effects, including seizures, seek immediate medical attention.

It is quite unusual for this medicine to cause an extremely severe allergic reaction. However, you should seek immediate medical attention if you detect any symptoms of a significant allergic reaction, such as a rash, itching/swelling (particularly of the face/tongue/throat), extreme dizziness, or difficulty breathing. These symptoms may indicate anaphylaxis.

This list of potential adverse effects is not exhaustive in any way. Please consult your physician or pharmacist if you have any side effects that are not listed above.

In the United States, if you are experiencing any adverse effects, please consult your primary care physician. You can call the FDA at 1-800-FDA-1088 or visit their website at to report any adverse effects.

In Canada, if you are experiencing any adverse effects, please consult your primary care physician. You can call Health Canada at 1-866-234-2345 to report any adverse effects you experience.


Tell your doctor or pharmacist if you are allergic to diphenhydramine, dimenhydrinate, or if you have any other allergies before you take any medication that contains diphenhydramine. There is a possibility that this product contains inactive substances, which, if present, could result in allergic responses or other complications. Discuss the matter further with your pharmacist for further information.

Before beginning treatment with this medication, it is important to discuss your medical history with your doctor or pharmacist, particularly if you have a history of the following conditions: difficulty breathing (such as asthma or emphysema), high pressure in the eye (glaucoma), heart problems, high blood pressure, liver disease, seizures, stomach or intestinal problems (such as ulcers or blockage), overactive thyroid (hyperthyroidism), or difficulty urinating (for example, due to enlarged prostate).

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This medication may cause you to feel drowsy, lightheaded, or distort your vision. Drinking alcohol or smoking marijuana (also known as cannabis) can make you feel more lightheaded and sleepy. Do not operate a motor vehicle, or any machinery, or engage in any activity that requires alertness or clear vision until you are able to complete them safely. Steer clear of beverages containing alcohol. If you are a marijuana user, you should consult your primary care physician (cannabis).

Before undergoing surgery, it is important to discuss all of the products you use with your dentist or doctor (including prescription drugs, nonprescription drugs, and herbal products).

Sugar and/or aspartame may be present in liquid formulations, chewable tablets, or dissolving tablets/strips, respectively. Alcohol can also be found in items that are liquid. If you have diabetes, liver illness, phenylketonuria (PKU), or any other condition that requires you to limit or avoid these ingredients in your diet, you should exercise extreme caution when consuming this food. Talk to your primary care physician or your local pharmacist about the proper use of this medicine.

It’s possible that children are more susceptible to the negative effects of this medication than adults. Young children are more likely to experience enthusiasm as a side effect of this medicine than sleepiness.

It is possible that older persons are more sensitive to the adverse effects of this medication, including drowsiness, dizziness, disorientation, constipation, or difficulty urinating. The likelihood of falling increases with factors such as drowsiness, dizziness, and bewilderment.

During pregnancy, it is important to only use this drug when it is absolutely necessary. Talk to your healthcare provider about the potential drawbacks and advantages.

This medication is excreted into breast milk and may have unwanted effects on an infant who is being breastfed. Before starting to breastfeed, you should talk to your healthcare provider.


Drug interactions can alter the way in which your prescriptions work or raise the likelihood that you will have major adverse effects. This document does not contain all possible medication interactions. Maintain a list of all the goods you use, including prescription and over-the-counter medications, as well as herbal remedies, and give it to both your primary care physician and your pharmacist. Without first consulting your physician, you should never alter the dosage of any medication, stop taking any medication, or start taking any new medication.

Antihistamines that are applied to the skin are an example of one type of product that can interact with this medication (such as diphenhydramine cream, ointment, or spray).

Tell your doctor or pharmacist if you are taking any other products that cause drowsiness, such as opioid pain relievers or cough relievers (such as codeine or hydrocodone), alcohol, marijuana (cannabis), drugs for sleep or anxiety (such as alprazolam, lorazepam, zolpidem), muscle relaxants (such as carisoprodol or cyclobenzaprine), or other antihistamines. Some of these products include (such as cetirizine, and chlorpheniramine).

You should read the labels on all of your medications (such as those meant to treat allergies or coughs and colds) since some of them may contain substances that make you feel sleepy. Talk to your local pharmacist about the proper way to use those products.

This medicine has the potential to interfere with a variety of laboratory procedures, including an allergy skin test, which could lead to inaccurate test findings. Ensure that the employees in the laboratory and all of your doctors are aware that you are using this medication.


Dial 911 if you suspect that someone has overdosed and they are exhibiting serious symptoms such as passing out or having problems breathing. In any other case, you should immediately contact a poison control center. To reach the poison control center for your area in the United States, dial 1-800-222-1222. Canada residents can call a provincial poison control center. Overdose can cause a variety of symptoms, including extreme sleepiness, convulsions, and dilated pupils. Before drowsiness sets in, children may experience mental and emotional shifts, such as anger, restlessness, and hallucinations.


Always be on time for your scheduled checkups and laboratory tests.

Neglected Dose

If you forget to take a dose, you should take it as soon as you realize you forgot. If it is getting close to the time of your next dose, you should skip the dose that you missed. Your next dose should be taken at the typical time. It is not necessary to double the dose in order to catch up.


Keep at room temperature and out of the reach of both light and moisture. Keep away from the bathroom at all costs. It is important to remember not to freeze any liquid forms of this drug. Always make sure that children and animals are kept well away from any medications.

Unless you have been specifically told to do so, you should not flush drugs down the toilet or pour them down a drain. When it is no longer needed or has passed its expiration date, dispose of this product in the appropriate manner. Talk to your neighborhood pharmacy or the firm that handles garbage disposal in your area.

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