
Trazodone is a medication that is typically used to treat depression but is also often prescribed off-label for insomnia. Benadryl is also used to treat insomnia, as well as allergies and colds. Both medications can cause drowsiness and dizziness, and combining them may increase these side effects, as well as confusion, difficulty concentrating, and impaired thinking, judgment, and motor coordination. While some people take both medications together, it is important to consult a doctor or pharmacist before doing so, as combining trazodone and Benadryl can be dangerous in certain situations.
| Characteristics | Values |
|---|---|
| Trazodone's designated use | Depression |
| Trazodone's off-label use | Insomnia |
| Trazodone doses | 50 mg, 100 mg, 150 mg, 300 mg |
| Benadryl's side effects | Sleepiness, dizziness, confusion, headache |
| Trazodone's side effects | Dizziness, drowsiness, confusion, difficulty concentrating |
| Side effects of taking Benadryl and Trazodone together | Increased dizziness, drowsiness, confusion, difficulty concentrating, impaired thinking, judgment, motor coordination |
| Alcohol's impact on Trazodone | Increased dizziness, drowsiness, difficulty concentrating |
| Alcohol's impact on Benadryl | Increased sleepiness, dizziness, confusion |
| Risk of taking Benadryl and Trazodone together | Excessive sleepiness |
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What You'll Learn

Trazodone's effectiveness for sleep
Trazodone is a prescription medication that has been used to treat depression for many years. It is not a sleep medicine, but it has a sedative effect that causes drowsiness. For this reason, it is often prescribed off-label to treat insomnia. Insomnia is characterised by difficulty falling and staying asleep, and those with insomnia may also wake up too early and be unable to get back to sleep.
Trazodone is one of the most widely prescribed sleep aids in the United States, despite only being approved for depression by the FDA. It is available in doses of 50 mg, 100 mg, 150 mg, and 300 mg. The maximum recommended dose is 400 mg/day, although this can be increased to 600 mg/day for those in inpatient psychiatric treatment.
A 2017 review reported that trazodone helps people fall asleep faster and sleep longer. Another review published in 2023 found that trazodone significantly decreased nightly awakenings and slightly improved sleep quality. However, the American Academy of Sleep Medicine does not recommend trazodone to treat insomnia based on its overall effectiveness. The American Academy of Sleep Medicine recommends treating insomnia with cognitive behavioural therapy for insomnia (CBT-I) instead, as it is more effective and does not have the serious side effects associated with sleep medications.
Some people who take trazodone for sleep report that it works on and off. On nights when they cannot sleep or wake up in the middle of the night, they may take a small dose of Benadryl to help them get back to sleep. However, using Benadryl and trazodone together can increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. In certain populations, like the elderly, this combination can impair thinking, judgment, and motor coordination.
There are also risks of serious side effects when using trazodone. It is possible to overdose on the medication, which can rarely result in death. An overdose can occur when someone accidentally or purposefully takes too much trazodone or mixes it with other medications or alcohol. Trazodone withdrawal is medically called antidepressant discontinuation syndrome (ADS), and up to 20% of people experience ADS after abruptly discontinuing the medication. Symptoms are typically mild and last one to two weeks, but can vary from person to person.
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Benadryl's side effects
Benadryl (diphenhydramine) is an antihistamine used to treat seasonal allergies, itchy and watery eyes, sneezing, runny nose, colds, dry coughs, insomnia, and motion sickness. It is available as a prescription and an over-the-counter (OTC) medication.
While Benadryl's side effects are typically mild, they may be more intense for some people. Some of the commonly reported side effects of Benadryl include:
- Dry mouth and eyes
- Drowsiness
- Blurred vision
- Impaired mental and motor functioning
- Sleepiness lasting into the next day
- Impaired hand-eye coordination and reaction time
- Seizures (in children)
- Fast heartbeat (in children)
Benadryl should be used with caution in children, preferably under the direction of a healthcare provider. It is not recommended for children under 6 years of age as they can experience more serious side effects, such as seizures and a fast heartbeat. The potential for overdose is also a major concern in young children. Benadryl is not typically advised for adults 65 and older, except to treat acute allergic reactions.
Additionally, Benadryl should not be mixed with alcohol as it may worsen side effects and increase the risk of overdose. Combining Benadryl with other medications, such as opioids, should also be avoided unless instructed by a healthcare provider.
In rare cases, some people have reported more serious side effects from Benadryl, including changes in blood cell levels, heart rhythm problems, and long QT syndrome. It is important to consult a doctor or pharmacist if any side effects are ongoing or bothersome.
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Trazodone's side effects
Trazodone is a prescription medicine that is used to treat depression, insomnia, schizophrenia, anxiety, and alcohol dependence. It is also used to control abnormal, uncontrollable movements that may be experienced as side effects of other medications. While trazodone has the lowest potential for abuse when compared to other sleep medications, it is sometimes purchased without a prescription, which can be a cause for concern.
As with any medication, trazodone can cause side effects in some people, but many experience none or only minor ones. Some common side effects of trazodone include:
- Dry mouth
- Dizziness
- Lightheadedness
- Fainting when getting up too quickly from a lying position
- Angle-closure glaucoma
- Difficulty concentrating
- Confusion
- Drowsiness
- Impaired thinking, judgment, and motor coordination (especially in the elderly)
- Problems with ejaculation
- Increased sex drive or decreased libido
- Headaches
Serious side effects are rare, occurring in less than 1 in 1,000 people. However, it is important to be aware of the following rare but severe side effects:
- Yellowing of the skin or eyes, which may indicate liver problems
- Difficulty urinating or constipation
- Unexplained bruising or increased susceptibility to infections
- Priapism, or a long-lasting and painful erection
- Allergic reaction (anaphylaxis)
- Suicidal thoughts (more common in children, teenagers, and young adults)
Additionally, it is important to avoid or limit alcohol consumption while taking trazodone as it can worsen side effects and increase the risk of overdose.
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Trazodone and alcohol
Trazodone is a prescription-only medication that is FDA-approved to treat depression. However, it is also used off-label to treat insomnia, anxiety, Alzheimer's disease, substance abuse, schizophrenia, bulimia, and fibromyalgia. The initial prescribed dose for depression is generally 150 mg/day, divided into two or three doses throughout the day. The maximum recommended dose is 400 mg/day.
When it comes to combining trazodone with other substances, it is important to exercise caution. Mixing trazodone with alcohol can increase levels of intoxication, resulting in extreme drowsiness and increasing the risk of overdose and death when consumed in excessive amounts. Trazodone and alcohol are both central nervous system depressants, so taking them together can have an additive effect and increase side effects like dizziness, drowsiness, and difficulty concentrating. In addition, alcohol can worsen anxiety and depression. Long-term use of both substances can also lead to physical dependence and withdrawal symptoms.
It is important to note that there is no known safe amount of alcohol to consume when taking trazodone. Therefore, it is generally recommended to avoid combining these substances altogether. If you want to have an occasional drink while taking trazodone, it is important to consult your doctor or pharmacist to discuss the risks and determine if it is safe for you. They may suggest certain medications that are safer to take in combination with alcohol.
While trazodone is not considered a drug with a high potential for abuse, it is sometimes purchased on the street without a prescription. Abruptly discontinuing trazodone after prolonged use can result in antidepressant discontinuation syndrome (ADS), with symptoms including anxiety, agitation, and sleep problems. Therefore, it is important to gradually taper off trazodone under the supervision of a physician.
In conclusion, trazodone and alcohol are two substances that should not be combined due to the increased risk of side effects and dangerous levels of intoxication. If you are taking trazodone, it is safest to avoid alcohol altogether. Always consult with your doctor or pharmacist if you have any questions or concerns about your medication and its interactions with other substances.
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Trazodone's off-label use
Trazodone is an antidepressant medication approved by the FDA to treat depression. However, it is frequently prescribed off-label for sleep-related issues, such as insomnia, and is considered safe for short-term use in adults. The typical dosage for sleep is between 25 mg and 100 mg taken before bedtime. It is not recommended for children, and caution should be exercised for those with a history of liver or kidney issues, heart disease, or seizures.
While trazodone is commonly used off-label for insomnia, it has various other off-label uses. These include the treatment of anxiety disorders, bulimia, benzodiazepine/alcohol dependence, fibromyalgia, central nervous system degenerative diseases (including behavioural disorders in dementia), schizophrenia, chronic pain disease, diabetic neuropathy, and sexual dysfunction.
Combining trazodone with other medications can increase the risk of side effects. For example, taking trazodone with diphenhydramine (an active ingredient in Benadryl) may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. This combination can be especially risky for the elderly, potentially impairing their thinking, judgment, and motor coordination. Therefore, it is crucial to consult a healthcare professional before taking trazodone with other medications.
Although trazodone has shown a lower potential for abuse compared to other sleep medications, there are concerns about its off-label use leading to dependence and withdrawal symptoms. Up to 20% of people may experience antidepressant discontinuation syndrome (ADS) after abruptly stopping trazodone, with symptoms typically lasting one to two weeks. Additionally, mixing trazodone with other medications or alcohol can increase the risk of overdose, and in rare cases, it may result in death.
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Frequently asked questions
Taking Benadryl with trazodone can result in increased side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. In certain populations, like the elderly, this combination can impair thinking, judgment, and motor coordination. It is advised to consult a doctor or pharmacist before taking these medications together.
Trazodone is an antidepressant that is commonly used off-label to treat insomnia. Side effects may include drowsiness, dizziness, and confusion. It is important to note that trazodone has the potential for drug interactions and should be used with caution.
Benadryl can cause sleepiness as a side effect. However, combining it with trazodone could lead to excessive sleepiness. It is recommended to consult a doctor or pharmacist before taking these medications together.
Yes, there are alternative medications for treating sleep disorders, such as zolpidem (Ambien) and melatonin. However, it is important to consult with a healthcare professional before taking any medication, as they can recommend the most suitable option for your specific needs.










































