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  1. Diphenhydramine Hcl - Overview

    Common brand names: Benadryl

    Diphenhydramine injection is an antihistamine used to treat life-threatening allergic reactions (anaphylaxis) along with epinephrine and other treatments. It is also used to relieve symptoms of household allergies, hay fever and the common cold when medication cannot be given by mouth.

    May Treat: Allergic conjunctivitis · Allergic reaction · Allergic rhinitis · Anaphylaxis · Cough and more

    Brand Names: Benadryl · Children's Benadryl Allergy · Banophen · Diphenhist · Wal-Dryl (diphenhydramine) and more

    Drug Class: Antihistamine - 1st Generation - Ethanolamines · Antihistamines - 1st Generation · Dermatological Antipruritics - Antihistamines · Sedative-Hypnotic - Antihistamines

    Availability: Prescription sometimes needed

    Pregnancy: Consult your doctor

    Lactation: Consult a doctor before using

    Alcohol: Limit intake while taking this medication

    Driving: May cause drowsiness or dizziness. Use caution

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    Side effects

    Common side effects

    • Thick bronchial secretions
    • Drowsy
    • Dizziness
    • Anticholinergic toxicity
    • Sedation
    • Muscle weakness

    If any of these effects persist or worsen, tell your doctor or pharmacist promptly

    • Drowsiness
    • Dizziness
    • Constipation
    • Stomach upset
    • Blurred vision
    • Dry mouth/nose/throat

    Tell your doctor right away if you have any serious side effects, including

    • Mental/mood changes
    • Difficulty urinating
    • Fast/irregular heartbeat

    Get medical help right away if you have any very serious side effects, including

    • Seizures

    A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including

    • Rash
    • Itching/swelling
    • Severe dizziness
    • Trouble breathing

    Other things to note

    • To relieve dry mouth, suck hard candy or ice chips, chew gum, drink water, or use a saliva substitute.
    • If your doctor has directed you to use this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

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    Precautions

    • Be careful not to stand up too quickly
    • Use candy or gum for relief
    • For aerosol, spray products : For external use only. Do not swallow. Avoid eyes, inside of nose, ears, or mouth. Clean and dry skin, then use a thin layer on area. Wash hands after applying. Call doctor if symptoms do not improve in 7 days. Keep medicine away from heat or flames.
    • For cream products : Do not apply to large areas of body. Do not use more often than recommended by Dr.
    • For elixir products : Measure dose using a dosing spoon/cup/syringe.
    • For liquid products : Unless MD directs, do not use in kids less than 12. This med. may contain sugar or aspartame.
    • For liquid in packet products : Learn how to correctly use this medicine.
    • For strip products : Before using tell Dr. if you have phenylketonuria. Place medicine on tongue to dissolve.
    • For syringe products : Don't use if solution has particles or color change. Caution. Review all drugs you are taking with your doctor.
    • For tablet products : Unless MD directs, do not use in kids less than 6. May make you drowsy or dizzy. Drive with caution. Reduce or avoid drinking alcohol. Avoid other drugs that make you sleepy. May cause dry mouth. Check warnings on OTC medications. Avoid other medicines containing the same drug. Call doctor if you are not getting better.
    • For tablet, chewable products : Chew medicine completely before swallowing.

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    How much diphenhydramine hydrochloride can a child take?
    Diphenhydramine Hydrochloride 25 to 50mg orally every four to six hours when needed. The maximum dose is 300mg/day. Children can sometimes get symptoms as a reaction to food: 12.5 mg to 25 mg orally every 4 to 6 hours, or according to weight, with a dose of 5mg/kg per day and a maximum amount of 300 mg/day.
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    Warnings

    • May cause drowsiness. Alcohol and marijuana may intensify this effect. Use care when operating a vehicle, vessel (e.g., boat), or machinery. ; May cause dizziness ; May cause blurred vision ; For strip products : Open packaging with dry hands. Dissolve medicine on the tongue or in the mouth. ; For tablet, chewable products : Chew this medication before swallowing. ; For tablet, disintegrating products : Allow medication to dissolve slowly in the mouth. Do not chew or swallow whole. ;

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    Interactions

    Before taking this medication, tell your doctor if you've had:

    • Breathing problems (such as asthma, emphysema)
    • High pressure in the eye (glaucoma)
    • Heart problems
    • High blood pressure
    • Liver disease
    • Seizures
    • Stomach/intestine problems (such as ulcers, blockage)
    • Overactive thyroid (hyperthyroidism)
    • Difficulty urinating (for example, due to enlarged prostate)

    Products that may interact with this drug include:

    • Antihistamines applied to the skin (such as diphenhydramine cream, ointment, spray)

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    Source: First Databank. For informational purposes only. Consult a medical professional for advice.
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    Table of Contents
    Overview
    Side effects
    Precautions
    How much diphenhydramine hydrochloride can a child take?
    Warnings
    Interactions
     

  1. The maximum oral dose of diphenhydramine for adults is generally reported as 100mg for a single dose or no more than 300mg in 24 hours, but this can vary depending on what condition diphenhydramine is being used for, the salt of diphenhydramine used (there are two salts available in the United States, diphenhydramine citrate and diphenhydramine chloride), the age of the person, how much diphenhydramine they have tolerated...

    What is the max dose of diphenhydramin…

    www.drugs.com/medical-answers/100-mg-diphenh…
    If taken orally, it should be 25 to 50 mg of diphenhydramine every 6 to 8 hours.100mg is the maximum dose in a twenty-four hour period. Doses of up to 100mg should be perfectly safe for most people, however, anyone should consult their doctor to get the right dose prescribed to them.

    how much diphenhydramine is an overdo…

    www.steadyhealth.com/topics/how-much-diphenhy…
    Diphenhydramine Hydrochloride: 25 to 50 mg orally every 4 to 6 hours as needed Maximum dose: 300 mg/day Parenteral: 10 to 50 mg deep IM or IV as needed, and may increase to 100 mg if required Maximum dose: 400 mg/day

    Diphenhydramine Dosage Guide + Max D…

    www.drugs.com/dosage/diphenhydramine.html
     
  2. Drugs.com
    https://www.drugs.com › medical-answers

    What is the max dose of diphenhydramine for adults? - Drugs.com

     
  3. Drugs.com
    https://www.drugs.com › dosage › diphenhydramine.html

    Diphenhydramine Dosage Guide + Max Dose, Adjustments

  4. Drugs.com
    https://www.drugs.com › diphenhydramine

    Diphenhydramine Uses, Dosage & Side Effects - Drugs.com

    What is the max dose of diphenhydramine for adults?
    The maximum oral dose of diphenhydramine for adults is generally reported as 100mg for a single dose or no more than 300mg in 24 hours, but this ca...
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    Does diphenhydramine raise blood pressure?
    Increased blood pressure is not a typical side effect of diphenhydramine, a first-generation antihistamine that lowers the effects of histamines in...
    How long does Benadryl take to work?
    Benadryl is quickly absorbed after oral administration and it starts to work within 30 minutes with peak effects reached within one to two hours. T...
    Can diphenhydramine be used as a sleep aid?
    Diphenhydramine can be used as a short-term sleep aid to help ease occasional sleep problems, such as when you have a cold or cough and it is preve...
    Does Benadryl make you sleepy?
    Benadryl (generic name: diphenhydramine) is an antihistamine that causes sleepiness in most people. Some people use Benadryl to help with sleep or...
    Does Benadryl help with or cause anxiety?
    One of the most common side effects with Benadryl is drowsiness, but in some people it can have the opposite effect, known as paradoxical excitatio...
    Diphenhydramine Hydrochloride vs Citrate: What's the difference?
    The difference between diphenhydramine hydrochloride and diphenhydramine citrate is that the salt used to bind the diphenhydramine, is different. F...
  5. WebMD
    https://www.webmd.com › drugs › diphenhydramine-oral › details

    Diphenhydramine Hcl - Uses, Side Effects, and More - WebMD

  6. WebMD
    https://www.webmd.com › drugs › diphenhydramine-oral › details

    Diphenhydramine oral - Uses, Side Effects, and More - WebMD

  7. Cleveland Clinic
    https://my.clevelandclinic.org › health › drugs

    Diphenhydramine Capsules or Tablets: Uses & Side Effects

  8. People also ask
    How much diphenhydramine hydrochloride can I take a day?
    12.5 mg to 25 mg orally every 4 to 6 hours, or according to weight, with a dose of 5mg/kg per day and a maximum amount of 300 mg/day. Adults: Diphenhydramine Hydrochloride 25 to 50mg orally every four to six hours when needed. The maximum dose is 300mg/day.

    Diphenhydramine - Uses, dosage, and side effects - MentalHealth.com

    mentalhealth.com
    What is diphenhydramine used for?
    Diphenhydramine is used to treat sneezing, runny nose, watery eyes, hives, skin rash, itching, and other cold or allergy symptoms. Diphenhydramine is also used to treat motion sickness, to induce sleep, and to treat certain symptoms of Parkinson's disease. Diphenhydramine may also be used for purposes not listed in this medication guide.

    Diphenhydramine Uses, Dosage & Side Effects - Drugs.com

    drugs.com
    How much diphenhydramine hydrochloride can a child take?
    Diphenhydramine Hydrochloride 25 to 50mg orally every four to six hours when needed. The maximum dose is 300mg/day. Children can sometimes get symptoms as a reaction to food: 12.5 mg to 25 mg orally every 4 to 6 hours, or according to weight, with a dose of 5mg/kg per day and a maximum amount of 300 mg/day.

    Diphenhydramine - Uses, dosage, and side effects - MentalHealth.com

    mentalhealth.com
    What are the rare side effects of diphenhydramine?
    Rare side effects of Diphenhydramine include: Seek medical care or call 911 at once if you have the following serious side effects: Serious heart symptoms such as fast, irregular, or pounding heartbeats; fluttering in your chest; shortness of breath; sudden dizziness, lightheartedness, or passing out.

    Diphenhydramine: Side Effects, Uses, Dosage, Interactions ... - RxList

    rxlist.com
    How do you take diphenhydramine hydrochloride?
    Diphenhydramine Hydrochloride 50mg once a day, half an hour before bedtime. Adults: Diphenhydramine Hydrochloride 25mg to 50mg orally, the first dose taken half an hour before travel and repeated before meals between six to eight hours later, including at bedtime, for the entire journey duration.

    Diphenhydramine - Uses, dosage, and side effects - MentalHealth.com

    mentalhealth.com
    Is diphenhydramine an antihistamine?
    Diphenhydramine is an antihistamine, meaning that it blocks the action of histamine in the body. Histamine is part of the defense system of our bodies. It is a chemical released by the body in response to what it perceives as a foreign substance (allergen) in the body (e.g., pollen, dust).

    Diphenhydramine - Uses, dosage, and side effects - MentalHealth.com

    mentalhealth.com
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