
Benadryl (diphenhydramine) and Tylenol (acetaminine) are both over-the-counter medications that can be used to aid sleep. Benadryl is an antihistamine that relieves allergy symptoms, while Tylenol relieves pain and discomfort. While it is safe to take both medications together, caution should be exercised as both drugs can have side effects and interactions with other substances and medications. For example, Benadryl can increase drowsiness when taken with alcohol or sleeping pills, and Tylenol can cause liver damage if taken in excess. Therefore, it is important to consult a doctor or pharmacist before using either medication, especially for those with other medical conditions or those taking other medications.
| Characteristics | Values |
|---|---|
| Is it safe to take Benadryl and Tylenol together? | Yes, it is safe to take Benadryl and Tylenol together. |
| Effectiveness as a sleep aid | Benadryl is not recommended as a long-term sleep aid as people develop a tolerance quickly. Tylenol is not helpful to treat sleeplessness that is not connected to pain or sleep disorders. |
| Side effects | Benadryl may cause an altered mental state, urinary retention, dry mouth, sleepwalking, and other parasomnias. Taking Benadryl with alcohol may increase drowsiness, dizziness, confusion, and slow breathing rate. |
| Precautions | Do not use Benadryl and Tylenol together for longer than two weeks to treat mild sleep troubles. Do not use either medication to make a child sleepy. |
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What You'll Learn

Benadryl and Tylenol can be taken together
Benadryl (diphenhydramine) is an antihistamine medication that can be used to treat allergic symptoms such as red, irritated, itchy, and watery eyes, sneezing, and a runny nose. It is available over the counter and is also an ingredient in many other OTC cough and cold products. Benadryl has sedative effects and is often used as a sleep aid, although medical experts advise against this due to the risk of side effects and the development of tolerance.
Tylenol (acetaminophen) is a medication used to relieve pain and reduce fever. It is also available over the counter and is considered generally safe for occasional use. However, excessive use of Tylenol can lead to serious liver damage, and it may cause severe skin reactions in rare cases.
While Benadryl and Tylenol can be taken together safely, it is important to be cautious when combining any medications. Both drugs are available without a prescription and are sometimes combined to provide relief from insomnia associated with mild pain and discomfort. Some brands even incorporate both active ingredients, diphenhydramine, and acetaminophen, to maximize their effects. However, it is important to note that these medications should not be used for longer than two weeks to treat mild sleep troubles or longer than seven days for cold or allergy symptoms.
Additionally, it is crucial to be aware of potential drug interactions and side effects. Benadryl should not be combined with certain types of medications, including sedative-hypnotics (sleep aids), alcohol, blood pressure medications, antidepressants, bowel disease medications, seizure medications, and cannabis products, as these combinations can increase the risk of side effects or lead to dangerous drug interactions. Similarly, Tylenol should be used with caution if consuming alcohol regularly, as both can cause liver damage.
It is always advisable to consult a healthcare professional before taking any medication, especially if you have other medical conditions or are taking other medications, to ensure the safe and effective use of Benadryl and Tylenol together.
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Benadryl may cause drowsiness
Benadryl (diphenhydramine) is an antihistamine medication that is commonly used to treat allergy symptoms such as sneezing, a runny nose, and watery eyes. It is available over the counter and comes in various forms, including tablets, chewable tablets, capsules, and liquids. While it is primarily used to treat allergies, Benadryl can also cause drowsiness as a side effect.
The drowsy effect of Benadryl is often welcomed by those who experience trouble falling asleep or insomnia. However, it is important to note that Benadryl is not recommended as a long-term sleep aid. While it may help with falling asleep, it does not improve overall sleep quality. Additionally, the body can quickly develop a tolerance to Benadryl, reducing its effectiveness over time.
The sedation effect of Benadryl typically lasts about eight hours but may persist into the next day if taken at night. This can impact your ability to perform daily tasks, such as driving or operating machinery, and it is advised to refrain from these activities if you experience dizziness or drowsiness while taking Benadryl. Combining Benadryl with alcohol or other medications that cause drowsiness can also worsen these effects.
In some cases, Benadryl may lead to "paradoxical excitation," especially in younger children. This stimulant effect can cause hyperactivity instead of drowsiness. Therefore, it is important to consult a doctor or pharmacist before taking Benadryl as a sleep aid, especially if you are taking other medications or have existing medical conditions.
While Benadryl may provide temporary relief from insomnia, it is not a substitute for addressing the underlying causes of sleep disturbances. It is recommended to first examine your bedtime routine, caffeine intake, and lifestyle factors that may impact your sleep quality. If insomnia persists, it is advisable to consult a physician or sleep specialist to explore alternative treatments or identify any potential medical conditions contributing to your sleep issues.
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Tylenol may cause liver damage
While Benadryl (diphenhydramine) can be used to treat insomnia in adults, it is not recommended as a long-term sleep aid. This is because it can cause side effects such as an altered mental state, urinary retention, and dry mouth. Additionally, it can lead to sleepwalking and other parasomnias.
Tylenol PM is a combination of diphenhydramine and acetaminophen, which provides temporary relief from pain and helps with sleep. However, Tylenol PM may cause liver damage if overdosed. Acetaminophen, when overdosed, is the leading cause of acute liver failure in the United States. An overdose occurs when more than 1000 mg is taken at one time or 4000 mg within 24 hours for adults.
Consuming more than four grams of acetaminophen in 24 hours can cause severe liver damage, and this amount is more likely to be exceeded when drinking alcohol alongside. Combining acetaminophen with alcohol, even in smaller doses, can cause problems. Therefore, it is recommended to limit alcohol consumption to no more than three drinks per day when taking acetaminophen.
Symptoms of liver damage include nausea, vomiting, stomach pain, loss of appetite, paleness, sweating, and fatigue. If you suspect an overdose, seek immediate medical attention to prevent further damage.
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Benadryl is an antihistamine
Benadryl is used to treat symptoms such as sneezing, a runny nose, watery eyes, hives, skin rash, itching, and other cold or allergy symptoms. It is also used to treat motion sickness, to induce sleep, and to treat certain symptoms of Parkinson's disease. Benadryl is available in tablet, chewable tablet, capsule, liquid, and topical form.
Diphenhydramine is also available in combination with other active ingredients such as zinc acetate, which is applied to the skin to relieve itching. It is important to note that Benadryl can cause drowsiness and may not be suitable for everyone. It is recommended to consult a doctor or pharmacist before using Benadryl, especially if taking sedatives or tranquilizers, and to avoid consuming alcohol with it as this may increase drowsiness.
While Benadryl can be used to induce sleep, experts caution against using antihistamines solely as a sleep aid. Dr. Philip Alapat, an assistant professor of medicine, states that "using Benadryl or any antihistamine for sleep has no long-term benefit," and that "most people develop a tolerance very quickly." Instead, he recommends that people with long-term insomnia consult a physician or sleep specialist to address the underlying problem.
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Tylenol is a pain relief medicine
Now, regarding the combination of Benadryl and Tylenol as a sleep aid, it is important to understand the effects of each medication. Benadryl, an antihistamine, is often used to treat allergies or the common cold, and drowsiness is a common side effect. While some people may use Benadryl as a sleep aid due to its drowsy side effect, experts caution against this practice as it can lead to tolerance and side effects such as altered mental state, urinary retention, and dry mouth.
On the other hand, Tylenol PM is a specific formulation that combines acetaminophen with diphenhydramine, another antihistamine. This combination is intended to provide both pain relief and a sleep aid. The diphenhydramine in Tylenol PM helps with insomnia or difficulty falling asleep, while the acetaminophen addresses minor aches and pains that may be disrupting sleep.
When considering the combination of Benadryl and Tylenol as a sleep aid, it is important to exercise caution and consult a healthcare professional. While Benadryl may induce drowsiness, it is not recommended as a long-term sleep solution due to the potential for tolerance and side effects. Tylenol PM, on the other hand, is specifically formulated for nighttime use and combines pain relief with a sleep aid. Therefore, if you are experiencing occasional sleeplessness due to minor aches and pains, Tylenol PM may be a more suitable option, but it is always advisable to seek professional medical advice before combining any medications.
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Frequently asked questions
Yes, it is safe to take Benadryl and Tylenol together. Both drugs are available over the counter and are often combined to use together. However, it is not recommended for use for longer than 2 weeks to treat mild sleep troubles.
Taking Benadryl with sedative-hypnotics can increase the risk of side effects like extreme drowsiness, confusion, and difficulty concentrating. Alcohol can also increase the sedating effect of Benadryl, worsening drowsiness and slowing breathing rate.
There are many over-the-counter sleep aids available that are safer than Tylenol PM in the long term. Advil PM, for example, is considered to be slightly better for the liver. It is recommended to consult a physician or sleep disorder specialist to determine what medication might work best.
No, Benadryl and Tylenol are not suitable for anyone younger than 12 years of age. Diphenhydramine, the active ingredient in Benadryl, should not be used to make a child sleepy.
















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