
Claritin-D is a popular allergy medication that contains pseudoephedrine for nasal decongestion. However, it can cause insomnia in some people, with a study showing that 27% of people who took the medication developed insomnia. If you are experiencing insomnia due to Claritin-D, it is recommended to switch to the 12-hour formulation or try Claritin without the decongestant. While you could take a sleep medication to alleviate Claritin-D-induced insomnia, it is important to consult a physician or sleep specialist to address the root cause of your insomnia and determine the best treatment option. Over-the-counter and prescription sleeping pills can have side effects and may not be suitable for long-term use. Additionally, combining sleep aids with other sedatives or alcohol can be dangerous. It is also important to note that antihistamines, which are found in some nighttime cold medications, can cause drowsiness and should not be taken with Claritin unless advised by a healthcare professional.
| Characteristics | Values |
|---|---|
| Claritin-D side effects | Insomnia, nervousness, increased heart rate, tossing and turning in bed |
| Preventative measures | Avoid taking Claritin-D close to bedtime, switch to Claritin without decongestant, fine-tune allergy medication schedule, optimize bedroom environment, increase daily movement |
| Sleep medication considerations | Consult a physician or sleep specialist, address potential underlying issues, consider short-term pharmacological agents if recommended by a doctor |
| Claritin interactions | Advil (ibuprofen), Motrin (ibuprofen), Tylenol (acetaminophen), Flonase (fluticasone), Mucinex (guaifenesin) |
| Claritin interaction precautions | Avoid combining with "nighttime" cold medications, antihistamines, multiple oral antihistamines, alcohol, sedatives |
| Sleep medication side effects | Drowsiness, hangover effect, dizziness, balance issues, constipation/diarrhea, muscle weakness, digestive problems, worsened snoring/sleep apnea, rebound insomnia, parasomnia, addiction |
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What You'll Learn

Claritin-D and insomnia
Claritin-D is a combination of loratadine, an antihistamine, and pseudoephedrine, a decongestant. While Claritin-D is an effective medication for relieving allergy symptoms, it has been associated with insomnia or trouble sleeping in some individuals.
Insomnia is a recognized side effect of Claritin-D due to the presence of pseudoephedrine, which has stimulant properties. Pseudoephedrine narrows blood vessels, reducing congestion in the nose. However, it can also tighten blood vessels around the heart, leading to increased heart rate and blood pressure, making it challenging to fall asleep. In a study evaluating pseudoephedrine side effects, 27% of participants who took the same amount of pseudoephedrine as in Claritin-D 24-hour developed insomnia.
The 24-hour formulation of Claritin-D has been found to cause less insomnia compared to the 12-hour version. However, it is important to note that not everyone experiences insomnia with Claritin-D. Individual differences play a role, and some people may experience nervousness or difficulty falling asleep as a result of the pseudoephedrine component.
If you find that Claritin-D is disrupting your sleep, it is recommended to switch to the 12-hour formulation or consider alternative treatments for allergies before bed, such as a steroid nasal spray. It is advised to not take Claritin-D close to bedtime to prevent insomnia. While sleep medication could be considered to alleviate Claritin-D-induced insomnia, it is important to remember that this treats the symptom rather than the underlying cause.
To promote better sleep, Harvard Medical School suggests optimizing your bedroom environment by keeping it dark, quiet, and cool, with a recommended temperature between 60 and 67 degrees Fahrenheit. Engaging in more physical activity during the day can also improve sleep quality, possibly due to the positive effects of exercise on brain chemicals. For those experiencing long-term insomnia, consulting a physician or sleep specialist is advised to address the issue and determine the most suitable treatment approach.
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Antihistamines and drowsiness
Antihistamines are a type of medicine often used to treat allergies. Antihistamines that make you feel sleepy include chlorphenamine (Piriton), cinnarizine, diphenhydramine, hydroxyzine, and promethazine. Non-drowsy antihistamines are less likely to make you feel sleepy, such as acrivastine, cetirizine, fexofenadine, and loratadine. Non-drowsy antihistamines are generally the best option and are available over the counter. However, types that make you feel sleepy may be better if your symptoms are stopping you from sleeping.
First-generation antihistamines are older antihistamines that may cause drowsiness, fatigue, decreased alertness, and reduced concentration. Examples of these drugs include diphenhydramine (Benadryl), which is a short-term sleep aid to help ease occasional sleep problems. However, older adults, children under 16, and pregnant women should avoid taking diphenhydramine as the risks may outweigh the benefits. Other first-generation antihistamines include chlorphenamine (Piriton), cinnarizine, hydroxyzine, and promethazine.
Second-generation antihistamines are newer antihistamines that are less likely to cause sedation. Examples include cetirizine (Zyrtec), fexofenadine (Allegra), and loratadine (Claritin). Allegra is generally the least sedating.
To avoid daytime drowsiness, take an antihistamine in the evening instead of in the morning. It may help you sleep, with the drowsy effects wearing off by the next morning. Be aware that drowsiness can last longer than expected, and some antihistamines can cause vivid dreams. Do not drink alcohol when taking antihistamines, as it will increase sedation.
While drowsiness may be a welcome side effect for people taking antihistamines for a cold or allergies, a Baylor College of Medicine sleep expert cautions against using this type of medication as a sleep aid. Dr. Philip Alapat, an assistant professor of medicine, states that "many allergy sufferers know that antihistamines work for their symptoms but also make them sleepy. People sometimes turn to these medications to help them sleep, even when they’re not sick. But the use of medication to force children or adults to sleep is generally not the best idea." Antihistamines can lead to an altered mental state, urinary retention, dry mouth, and sleepwalking. While these side effects are generally mild and well tolerated in young patients, they can pose a risk, especially for the elderly.
If you are experiencing insomnia due to Claritin-D, you could theoretically take a sleep medication to alleviate it. However, this would only be treating the symptom and not the problem. Instead, you could try switching to the 12-hour formulation or just Claritin (without the decongestant) to manage your allergies before bed. To promote good sleep, the Harvard Medical School recommends optimizing your bedroom by keeping it dark, quiet, and cool, with a temperature between 60 and 67 degrees Fahrenheit. Additionally, moving more during the day and exercising can help improve sleep due to the effects of exercise on brain chemicals like serotonin.
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Side effects of sleep medication
Sleep medication can be beneficial for those experiencing short-term sleep issues due to stress, jet lag, or other temporary factors. However, it's important to be aware of the potential side effects associated with their use.
One of the most common side effects of sleep medications is drowsiness, which can persist into the following day. This can negatively impact your ability to drive, work, or perform daily tasks. Other central nervous system effects include impaired focus, memory issues, and confusion. Additionally, sleep medications can cause a "'hangover'" effect, leaving you feeling groggy and disoriented the next day.
Sleep medications can also lead to difficulty with movement and balance, increasing the risk of falls and accidents, especially in older adults. Some people may experience constipation, diarrhea, or other digestive problems such as gas, heartburn, and nausea. Burning or tingling sensations in the extremities have also been reported.
More severe side effects may include allergic reactions, parasomnias (such as sleepwalking), and dependence on the medication. Older adults are at a higher risk of experiencing adverse effects, and sleep medication should be used cautiously in this population. It's important to consult a doctor if you experience any concerning side effects and to prioritize addressing the underlying causes of sleep issues rather than solely relying on medication.
While antihistamines like Benadryl can cause drowsiness, they are not recommended as a sleep aid due to potential side effects such as altered mental state, urinary retention, and dry mouth. Furthermore, they can lead to parasomnias and are not a long-term solution for sleep issues.
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Claritin and non-oral antihistamines
Claritin (generic name loratadine) is a non-drowsy oral antihistamine medication used to treat allergies. It is available over the counter and provides 24-hour relief from allergy symptoms such as a runny nose and watery eyes. Claritin is generally well-tolerated and does not cause drowsiness when taken as directed. However, taking more than the recommended dosage may lead to drowsiness.
While Claritin itself is non-drowsy, another formulation, Claritin-D, has been associated with insomnia in some individuals. Claritin-D contains pseudoephedrine, a decongestant, in addition to the antihistamine loratadine. Insomnia is a known side effect of pseudoephedrine, and approximately 27% of people who took the equivalent dose of pseudoephedrine in Claritin-D experienced insomnia.
If you find that Claritin-D is disrupting your sleep, there are a few alternatives you can consider. One option is to switch to the 12-hour formulation of Claritin-D or to take the original Claritin without the decongestant. It is recommended to avoid taking Claritin-D close to bedtime and to optimise your bedtime routine and environment to promote better sleep. Additionally, managing your allergies before bed, through measures such as nasal steroids or other allergy medications, can help improve your sleep quality.
While antihistamines like Benadryl (diphenhydramine) can cause drowsiness and may aid sleep, experts advise against using them solely as a sleep aid due to potential side effects, including altered mental state, urinary retention, and dry mouth. These side effects can pose risks, especially in elderly individuals. Instead, it is recommended to consult a physician or sleep specialist to address chronic insomnia and determine the most suitable treatment option.
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Claritin and sleep medication alternatives
Claritin-D is known to cause insomnia in some people. A study evaluating pseudoephedrine side effects found that 27% of people who took 120 milligrams of extended-release pseudoephedrine twice a day (the same amount in Claritin-D 24-hour) developed insomnia. Other common side effects include a slightly increased heart rate, nervousness, and difficulty falling asleep.
If you are taking Claritin-D and experiencing insomnia, there are a few alternatives you can consider:
Switch to the 12-hour formulation
Instead of taking the 24-hour formulation, you can switch to the 12-hour version of Claritin-D. This may help reduce the impact on your sleep, as the medication will be out of your system more quickly.
Take Claritin without the decongestant
Claritin-D contains a combination of an antihistamine (loratadine) and a decongestant (pseudoephedrine). It may be the pseudoephedrine that is causing your sleep issues. You could try switching to just Claritin (loratadine), which does not contain the decongestant. Loratadine has a low risk of drowsiness on its own, but be cautious when combining it with other medications that cause drowsiness.
Fine-tune your allergy medication schedule
Try taking your allergy medication earlier in the day, and avoid taking it close to bedtime. This may help reduce the impact on your sleep.
Optimize your bedroom for sleep
Make sure your bedroom is dark, quiet, and cool. The ideal temperature for sleep is between 60 and 67 degrees Fahrenheit.
Increase your daily movement
Exercise can improve sleep, possibly due to its effects on brain chemicals like serotonin. Try to move more during the day to promote better sleep at night.
If you are considering taking a sleep medication to counteract the insomnia caused by Claritin-D, it is important to note that you would be treating the symptom and not the problem. Sleep medications can have side effects and should not be used long-term. It is always best to consult a physician or sleep specialist to determine the best course of action for your specific situation.
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Frequently asked questions
It is not advisable to combine Claritin with other medications that cause drowsiness. However, you can safely combine it with Advil (ibuprofen) or Motrin, another brand-name version of ibuprofen.
Claritin has a low risk of causing drowsiness on its own, but this risk increases when combined with other substances that cause drowsiness. It can also cause problems with balance and coordination.
While it is theoretically possible to take a sleep medication to alleviate Claritin-induced insomnia, it is important to consult a healthcare professional before doing so. Treating the symptom rather than the problem is not advisable.
If Claritin is keeping you up at night, you can try switching to the 12-hour formulation or optimizing your bedroom for sleep by keeping it dark, quiet, and cool. Moving more during the day and exercising can also promote better sleep.























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