What is Diphenhydramine?

Diphenhydramine is a brand-name, over-the-counter antihistamine. It helps relieve symptoms of seasonal fever, other allergies, and the common cold. The medications are also used to treat itchy skin, hives, and other causes.

Diphenhydramine is very effective in decreasing the itchy skin for hives. This is often considered the first-choice treatment for hives. This is also useful for decreasing symptoms of some seasonal allergies.


Diphenhydramine Uses

Diphenhydramine is an antihistamine that reduces the effects of the body's natural chemical histamine. This can produce symptoms of sneezing, itching, watery eyes, and runny nose. Diphenhydramine medications are used for treating runny nose, watery eyes, hives, skin rash, itching, and other cold and allergy symptoms.

Diphenhydramine is also used for treating motion sickness, to induce sleep and for treating some symptoms like Parkinson’s disease.

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Diphenhydramine Side Effects

Some of the common side effects of Diphenhydramine are:

Some of the serious side effects of Diphenhydramine are:

If you have any of these serious symptoms, immediately contact your doctor for further assistance. In any case, due to Diphenhydramine, if you get any kind of reaction in your body, try avoiding it.

A doctor advised you to take the medicines after seeing your problems and the benefits of this medicine, which are greater than the side effects. The majority of the people who use this medicine don’t show any side effects. Get medical help immediately if you get any serious Diphenhydramine side effects.


Precautions

Before taking Diphenhydramine, talk to your doctor if you are allergic to it or to any other medications. The product may contain inactive ingredients that can cause allergic reactions or other serious problems.

Before using the medication, talk to your doctor if you have any of the medical histories, such as:

The drug may make you dizzy and can blur your vision. Avoid taking high dosages of Diphenhydramine. Also, try to avoid the daily consumption of alcohol while taking the medications.


How to take Diphenhydramine?

Diphenhydramine comes in the form of tablets, capsules, liquid-filled capsules, dissolving strips, and liquids that should be taken through the mouth. Take Diphenhydramine every 4 to 6 hours if you are taking the medication for treating various allergies, as well as cold and cough symptoms. When diphenhydramine is used to relieve allergy, cold, and cough symptoms, it is usually taken every 4 to 6 hours. When diphenhydramine is used to treat motion sickness, it is usually taken 30 minutes before departure and, if necessary, before meals and before bedtime. Try to take Diphenhydramine tablets 30 minutes before sleep for the treatment of insomnia.

Check the labels of over-the-counter cough and cold products carefully before using two or more products at the same time. These products may contain the same active ingredients, and taking them together could cause you to overdose. This is especially important if you are giving a child cough and cold medicine.


Dosage

Dosage for fever or allergies

-25mg to 50 mg every 4 to 6 hours.

Dosage for symptoms of the various common cold

-25 to 50 mg every 4 to 6 hours.

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Missed Dose

Missing one or two doses of Diphenhydramine won’t have any effect on your body. The skipped dose causes no problem. However, with some medications, it won’t work if you don’t take the dosage on time. If you miss a dose, some sudden chemical change may affect your body. In some cases, your doctor would advise you to take the prescribed medicine as soon as possible if you have missed the dose.


Overdose

Overdose of a drug can be accidental. If you have taken more than the prescribed Diphenhydramine tablets, there is a chance of getting a harmful effect on your body’s functions. Overdose of a medicine can lead to some medical emergency.


Interactions

Drug interactions can change the way your medicines work or increase your risk of serious side effects. Keep a list of all the products you use and share it with your doctor and pharmacist.

Talk to your doctor if you are taking other products that can cause drowsiness, such as opioid pain relievers or cough pain relievers and alcohol and marijuana.


Storage

Direct contact with heat, air, and light may damage your medicines. Exposure to medicine may cause some harmful effects. The medicine must be kept in a safe place and out of children’s reach.

Mainly the drug should be kept at room temperature between 68ºF and 77ºF (20ºC and 25ºC).

Before taking Diphenhydramine, consult your Doctor. If you face any problems or get any side effects after taking Diphenhydramine, rush immediately to your nearest hospital or consult your doctor for better treatment. Carry your medications always in your bag while travelling to avoid any immediate emergencies. Follow your prescription and follow your Doctor's advice whenever you take Diphenhydramine.


Diphenhydramine Cetirizine
Diphenhydramine is a brand-name, over-the-counter drugs which are classified as an antihistamine. This helps relieve symptoms of seasonal fever, other allergies, and the common cold. Cetirizine tablets are an antihistamine used to relieve allergy symptoms such as watery eyes, runny nose, itching eyes/ nose, hives, and itching.
Diphenhydramine is an antihistamine that reduces the effects of the body's natural chemical histamine. This can produce symptoms of sneezing, itching, watery eyes, and a runny nose. Cetirizine does not prevent hives, but it treats allergic severe reaction
Some of the serious side effects of Diphenhydramine are:
  • Decreased memory
  • Impaired thinking
  • Dementia
  • Irregular heartbeat
  • Seizures
Some of the serious side effects of cetirizine are:
  • Fast
  • Weakness
  • Confusion
  • Tired feeling
  • Nausea
  • Headache

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Frequently Asked Questions

1. What is diphenhydramine used for?

Diphenhydramine is an antihistamine which reduces the effects of the natural chemical histamine in the body. This can produce symptoms of sneezing, itching, watery eyes and runny nose.

2. What are the side effects of diphenhydramine?

Some of the serious side effects of Diphenhydramine are:

  • Decreased memory
  • Impaired thinking
  • Dementia
  • Irregular heartbeat
  • Seizures

3. Does diphenhydramine make you sleepy?

Diphenhydramine can make you feel sleepy because the drug can cause some serious side effects. Talk to your doctor if you are facing some serious side effects.

4. Can I take diphenhydramine every night?

Diphenhydramine comes in the form of tablets, capsules, liquid-filled capsules, dissolving strips and liquid that should be taken through the mouth. The medications can be taken before sleep as it can help you get some quality sleep.

5. Can I use Benadryl cough medicine for cold symptoms?

Yes, Benadryl cough medicine can be used to relieve symptoms of colds, such as cough and congestion. However, always consult with a healthcare professional before using any medication for off-label purposes.

6. Is Diphenhydramine safe for children?

Diphenhydramine can be used in children, but the dosage and formulation (such as syrup or tablets) should be appropriate for their age. Always follow the pediatrician’s advice and the instructions on the medication label.

7. How does Diphenhydramine HCL work?

Diphenhydramine HCL works by blocking histamine, a substance in the body that causes allergic symptoms. This action helps to reduce itching, swelling, and other allergy symptoms.

8. Can I take Diphenhydramine with other medications?

Some medications can interact with Diphenhydramine, so it is important to inform your doctor about all the medications you are currently taking. This includes over-the-counter drugs and supplements.

9. What is the difference between Diphenhydramine and Diphenhydramine Hydrochloride?

There is no difference; Diphenhydramine Hydrochloride is simply the full chemical name of Diphenhydramine, commonly referred to as Diphenhydramine HCL.


Disclaimer: The information provided herein is accurate, updated and complete as per the best practices of the Company. Please note that this information should not be treated as a replacement for physical medical consultation or advice. We do not guarantee the accuracy and the completeness of the information so provided. The absence of any information and/or warning to any drug shall not be considered and assumed as an implied assurance of the Company. We do not take any responsibility for the consequences arising out of the aforementioned information and strongly recommend you for a physical consultation in case of any queries or doubts.

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