
Benadryl, also known as diphenhydramine, is an antihistamine medication used to treat allergies, allergic reactions, and common cold symptoms. It is available as a prescription and over-the-counter (OTC) medication for adults and children aged six and above. While Benadryl is effective in reducing allergy and cold symptoms, it can also cause various side effects, ranging from mild to severe. One of the most common side effects is drowsiness, which can impact activities that require alertness and coordination. Other side effects include dizziness, stomach upset, blurry vision, and excitability in children. More severe side effects include allergic reactions, seizures, and difficulty urinating. It is important to consult a healthcare provider if any of these side effects occur or persist.
| Characteristics | Values |
|---|---|
| Common Brand Names | Banophen, Benadryl, Dibenil, Diphen, Hydramine, Nervine, Nytol, QlearQuil, Simply Sleep, Sominex, Unisom, ZzzQuil |
| Common Generic Names | Diphenhydramine, diphenhydramine citrate, diphenhydramine HCl, diphenhydramine hydrochloride, diphenhydramine tannate |
| Uses | Allergies, allergic reactions, common cold symptoms, trouble sleeping, motion sickness, movement problems |
| Side Effects | Dizziness, drowsiness, excitability in children, blurry vision, photosensitivity, seizures, fast heartbeat |
| Age Restrictions | Should not be used in children younger than 6 years old |
| Forms | Capsule, liquid, tablet, liquid injected into a blood vessel or muscle |
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What You'll Learn
- Benadryl (diphenhydramine) is an antihistamine used to treat allergies, allergic reactions, and the common cold
- Benadryl can cause mild side effects such as sleepiness, dizziness, and drowsiness
- Benadryl may also lead to serious side effects like seizures, excitability in children, and allergic reactions
- The drug may increase skin sensitivity to light, causing severe sunburns, blisters, and swelling
- Benadryl is not recommended for children under 6 years old due to the risk of serious side effects

Benadryl (diphenhydramine) is an antihistamine used to treat allergies, allergic reactions, and the common cold
While Benadryl is an effective treatment for these conditions, it can cause side effects, including drowsiness, dizziness, stomach upset, and blurred vision. It may also cause excitability and hyperactivity in children, and in rare cases, seizures. Due to these risks, Benadryl is typically not recommended for children under six years old.
In addition to these side effects, there is some evidence that antihistamines, including Benadryl, may be linked to muscle soreness and damage. A study by Matthew Ely and colleagues at the University of Oregon found that while antihistamines reduced perceived discomfort and preserved strength after a hard workout, they also resulted in increased muscle damage. This finding suggests that antihistamines may have a dual effect, reducing pain sensitivity while also potentially causing muscle issues.
However, it is important to note that the evidence on the impact of antihistamines on muscle soreness is not conclusive, and more research is needed to fully understand the relationship. If you are experiencing muscle aches or other side effects while taking Benadryl, it is important to consult your healthcare provider, who can advise on adjusting your dosage or exploring alternative treatments.
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Benadryl can cause mild side effects such as sleepiness, dizziness, and drowsiness
Benadryl, also known as diphenhydramine, is an antihistamine medication used to treat allergies, allergic reactions, and common cold symptoms. It can also be used to treat insomnia and motion sickness. While Benadryl is a useful medication for these purposes, it can cause some mild side effects, such as sleepiness, dizziness, and drowsiness. It is important to note that these side effects are usually temporary and may be easily managed. However, if you experience any bothersome or persistent symptoms, it is recommended to consult a doctor or pharmacist for advice.
The mild side effects of Benadryl are more common in children, who may also experience excitability and hyperactivity. Benadryl is generally not recommended for children under the age of 6 due to the risk of more serious side effects, such as seizures and a fast heartbeat. In adults, more serious side effects of Benadryl can include allergic reactions, urinary retention, and blurred vision. It is advised to discontinue the medication and seek medical help if any of these serious side effects occur.
Benadryl can also increase photosensitivity, making the skin more sensitive to light from the sun, sunlamps, and tanning beds. This can lead to severe sunburns, blisters, and swelling if adequate protection is not used when exposed to these light sources. Additionally, alcohol consumption should be avoided while taking Benadryl, as it can enhance the medication's drowsiness side effects.
While Benadryl is a helpful medication for treating allergies and related conditions, it is important to be aware of its potential side effects and take appropriate precautions. Consulting a healthcare professional is always recommended before starting any new medication to ensure safe and effective use.
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Benadryl may also lead to serious side effects like seizures, excitability in children, and allergic reactions
Benadryl, also known as diphenhydramine, is an over-the-counter antihistamine medication used to treat allergies, common cold symptoms, allergic reactions, trouble sleeping, motion sickness, and certain movement problems. While Benadryl is generally safe for short-term use, it may lead to serious side effects in some cases.
One of the most concerning side effects of Benadryl is seizures. Some people who have taken Benadryl (diphenhydramine) have reported experiencing convulsions or seizures. This side effect appears to be more common in children, and it can be challenging to recognise certain types of seizures. If you or someone you know experiences muscle twitching, jerking, spasms, tremors, or other uncontrolled movements after taking Benadryl, it is crucial to stop taking the medication and seek immediate medical attention.
Another serious side effect of Benadryl is excitability in children. Benadryl can cause increased alertness and energy levels in young individuals, which may lead to hyperactivity or difficulty sleeping. This excitability can impact a child's ability to focus and may result in behavioural changes. It is important to monitor children closely after they have taken Benadryl and seek medical advice if you have concerns.
Benadryl may also cause allergic reactions, which can be severe. Some people may experience symptoms such as hives, swelling of the face, lips, tongue, or throat, difficulty breathing, and anaphylaxis. If you suspect an allergic reaction, stop taking Benadryl immediately and seek emergency medical assistance.
Furthermore, Benadryl is not recommended for infants and newborns. The medication can cause serious side effects in newborn or premature babies and should be avoided. Additionally, breastfeeding mothers should not take Benadryl as it can pass into breast milk and potentially harm the infant.
It is important to note that the risk of side effects may be higher in individuals who are 60 years or older, or younger than 18 years of age. If you fall into either of these age groups, consult your healthcare provider to assess your risks before taking Benadryl. Additionally, always follow the instructions provided with the medication and do not exceed the recommended dosage.
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The drug may increase skin sensitivity to light, causing severe sunburns, blisters, and swelling
Benadryl, also known as diphenhydramine, is an antihistamine medication used to treat allergies, allergic reactions, and common cold symptoms. It can also be used to treat insomnia, motion sickness, and certain movement problems. While Benadryl is a useful medication for many people, it does have some side effects that users should be aware of. One of the most concerning side effects is the potential for severe allergic reactions, which can include seizures. In addition, Benadryl can cause excitability and hyperactivity in children and should not be used to make a child sleepy. Due to these risks, it is recommended that Benadryl not be given to children under the age of six without the direction of a doctor.
Another important side effect to be aware of when taking Benadryl is the potential for increased skin sensitivity to light. This means that exposure to sunlight, sunlamps, or tanning beds can cause severe sunburns, blisters, and swelling. This reaction is known as photosensitivity, and it can occur with Benadryl use. If you need to be in the sun while taking Benadryl, it is important to take precautions such as wearing sunscreen, a hat, and clothing that covers your skin to protect yourself from the sun's rays.
The photosensitivity caused by Benadryl can lead to more than just sunburns and blisters. The skin may become swollen, itchy, and irritated. This reaction can be painful and uncomfortable, and it may require medical attention in severe cases. It is always important to monitor your skin health, especially when taking medications that can increase sensitivity to light.
In addition to the risks of photosensitivity, Benadryl may also cause other skin-related side effects. Some users have reported experiencing skin rashes, which can be a sign of a serious allergic reaction. It is important to stop taking Benadryl and seek medical attention if you experience a rash, especially if it is accompanied by other symptoms such as a fever or headache. These could be indicators of a more severe condition that requires immediate treatment.
While Benadryl can be an effective medication for treating allergies and other conditions, it is important to be aware of the potential side effects, especially those related to the skin. Increased skin sensitivity to light can lead to severe sunburns, blisters, and swelling, so taking the necessary precautions when exposed to sunlight is crucial. Always speak to a healthcare professional if you have any concerns or questions about taking Benadryl or any other medication.
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Benadryl is not recommended for children under 6 years old due to the risk of serious side effects
Benadryl, also known as diphenhydramine, is an antihistamine medication that can be used to treat allergic reactions, allergies, trouble sleeping, motion sickness, or certain movement problems. It is available in various forms, including capsules, liquids, tablets, and chewable tablets.
While Benadryl has been a popular medication for children, it is important to note that it is not recommended for children under 6 years old unless directed by a doctor. The manufacturer's label on Children's Benadryl products specifically advises parents of children under 6 years old not to use the product unless instructed by a healthcare provider. This recommendation is based on the potential risk of serious side effects in younger children.
Children may experience side effects such as drowsiness, dizziness, stomach upset, and excitability after taking Benadryl. In some cases, Benadryl may cause allergic reactions, seizures, or difficulty urinating. These side effects can be more common or pronounced in younger children, and their impact can be more severe. Therefore, it is crucial to consult a healthcare professional before administering Benadryl to children under 6 years old to assess the benefits and risks for each individual case.
Furthermore, newer second-generation antihistamines, such as loratadine, cetirizine, and fexofenadine, offer longer-lasting effects and fewer side effects. These modern alternatives are more selective in their mechanism of action, targeting histamine pathways more effectively while interfering less with other bodily processes. As a result, they are often preferred over Benadryl for treating allergies and related symptoms in children.
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Frequently asked questions
Benadryl is used to treat allergies, allergic reactions, and common cold symptoms. It is also used to treat insomnia, motion sickness, and certain movement problems.
Common side effects of Benadryl include drowsiness, dizziness, stomach upset, and blurred vision. In children, Benadryl can cause hyperactivity, excitability, and seizures. Benadryl may also cause mild side effects such as changes in blood cell levels.
There is no clear evidence that Benadryl causes muscle aches. In fact, a study published in the Journal of Applied Physiology found that taking an antihistamine medication like Benadryl may help reduce delayed onset muscle soreness (DOMS) after a hard workout. However, it is important to note that the results of this study are complex and more research is needed to fully understand the relationship between antihistamines and muscle soreness.











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