Benadryl: Details about the Medication

Benadryl: Details about the Medication

What is Benadryl?

Benadryl, also known as Diphenhydramine (DPH), is an antihistamine used to treat allergies, insomnia, nausea, and the common cold. It is available in oral and injection forms and can be buyd over-the-counter for motion sickness. Benadryl works by blocking the release of histamine, a chemical produced by the body during an allergic reaction.

What to know before taking Benadryl?

Prior to taking Benadryl, it is important to avoid it if you are allergic to the medication or any of its components. Inform your doctor about any medical conditions you have or have had, such as digestive system blockage, gallbladder problems, urination issues, colostomy or ileostomy, liver or kidney disease, asthma or other breathing problems, chronic obstructive pulmonary disease (COPD), cough with mucus, heart disease, low blood pressure, glaucoma, or thyroid problems. Lactating mothers should not use Benadryl as it can harm the nursing baby, and pregnant women should consult their doctor before taking the medication. Additionally, inform your doctor if you are taking any potassium supplements.

How to take Benadryl?

Take Benadryl exactly as prescribed by your doctor and follow all directions on the prescription and medicine labels. Do not exceed the recommended dosage. It is not recommended for children under two years of age as misuse can be fatal. If your symptoms do not improve after seven days of treatment or if you experience a persistent cough, fever, headache, or skin rashes, consult your doctor. Benadryl may cause allergic reactions on the skin, so inform your doctor if you experience any. Keep the medication out of reach of children and store it at room temperature away from heat and moisture. Properly dispose of any leftover medication after completing the treatment by consulting a nearby pharmacist or flushing it down the toilet.

Benadryl dosage

The dosage of Benadryl varies depending on factors such as age, weight, symptoms, the seriousness of the condition, other medical conditions, and other medications being used. The following are average prescribed doses:

In oral form

For adults and children (12 years or above)

25 mg to 50 mg, once or twice a day, as prescribed by the doctor. The dosage may be adjusted by the doctor.

For children (6 to 12 years)

12.5 mg to 25 mg, once or twice a day, as prescribed by the doctor. The dosage may be adjusted by the doctor.

For children (below six years)

The doctor will prescribe the dosage for this age group.

In the form of an injection

For adults (18 years or above)

10 mg to 50 mg via IV in a day. The dosage may be adjusted by the doctor. In certain cases, doctors may prescribe up to 100 mg in a day, with a maximum daily limit of 400 mg.

For children (below 18 years of age)

The average dose of Benadryl is dependent upon the child’s weight. The doctor may prescribe 5 mg/kg twice or thrice a day. The dosage may be adjusted by the doctor. The maximum daily dose for this age group is 25 mg.


If you feel uneasy while taking Benadryl, consult your doctor or seek medical assistance. You can also contact the poison helpline at 1-800-222-1222.

What to avoid while using Benadryl?

Avoid consuming alcohol or other alcoholic drinks as they can interact dangerously with Benadryl. The medication may impair your reactions and thinking ability, so refrain from activities that require attention and alertness. Inform your doctor or pharmacist about any other over-the-counter medications you are taking before using Benadryl.

Benadryl side effects

Common side effects of Benadryl include dizziness, drowsiness, loss of coordination, dry mouth, nose or throat, upset stomach, constipation, blurred vision, dry eyes, hangover feeling, and daytime drowsiness. If these symptoms become bothersome, consult your doctor. Stop using the medication and seek medical attention if you experience pounding heartbeats, fluttering in

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