Medications That Can Worsen Sleep Apnea

Many people take medications that help manage pain, anxiety, allergies, insomnia, or other health conditions without realising they can also affect breathing during sleep. While these medicines are often safe and effective when used as prescribed, some can make sleep apnea worse or increase the risk of developing sleep-related breathing problems.

This does not mean you should stop taking a prescribed medication on your own. However, if you have sleep apnea, or have noticed louder snoring, gasping during sleep, or increasing daytime sleepiness after starting a new medicine, it is important to speak to your healthcare provider about your symptoms. In some cases, adjusting the dose, changing the timing, or switching to a different medication may improve both your sleep and your breathing.

How Can Medications Affect Sleep Apnea?

Sleep apnea occurs when breathing repeatedly slows or stops during sleep. In obstructive sleep apnea (OSA), the muscles supporting the upper airway relax too much, allowing the airway to collapse. In central sleep apnea (CSA), the brain temporarily fails to send the signals needed to maintain normal breathing.

Certain medications can interfere with these processes in different ways. Some relax the muscles of the throat, making the airway more likely to close. Others suppress the brain's normal breathing drive, leading to slower or shallower breathing during sleep. Some medications also make it more difficult for the body to wake briefly and reopen the airway when breathing is interrupted.

The effects vary from person to person. Factors such as age, body weight, underlying lung disease, existing sleep apnea, and taking multiple sedating medications at the same time can all increase the risk of breathing problems during sleep.

Medications That May Worsen Sleep Apnea

Several types of medications have been associated with worsening sleep-disordered breathing. They should not necessarily be avoided altogether, but they may require closer monitoring in people with sleep apnea.

Opioid Pain Medications

Opioids are among the medications most strongly linked to sleep-related breathing disorders. Common examples include morphine, oxycodone, hydrocodone, fentanyl, methadone, and codeine. Because of the severe risks associated with these drugs, they are only accessible through a verified prescription or, in the case of methadone, through SAMHSA Opioid Treatment Programs.

These medicines reduce pain by acting on the central nervous system, but they also slow breathing and reduce the brain's response to rising carbon dioxide levels. As a result, breathing may become slower, shallower, or pause completely during sleep. Long-term opioid use is particularly associated with central sleep apnea, although obstructive events may also become more frequent. The risk is generally higher with larger doses, long-acting opioid medications, and combinations with other sedating drugs.

If you take opioids and have symptoms such as loud snoring, witnessed pauses in breathing, or excessive daytime sleepiness, your healthcare provider may recommend screening for sleep apnea.

Benzodiazepines

Benzodiazepines are commonly prescribed for anxiety, panic disorders, muscle spasms, and insomnia. Examples include lorazepam, diazepam, temazepam, clonazepam, and alprazolam.

These medications relax muscles throughout the body, including those that help keep the airway open during sleep. They also reduce the brain's normal arousal response, making it less likely that you will briefly wake up and restore normal breathing when an obstruction occurs.

For some people with obstructive sleep apnea, this can lead to longer breathing pauses and lower overnight oxygen levels. If benzodiazepines are necessary, your healthcare provider will weigh their benefits against the potential risks and prescribe the lowest effective dose whenever possible.

Sleeping Tablets and Sedatives

Prescription sleep medications, including the so-called "Z-drugs" such as zolpidem and zaleplon, may also affect breathing in some people. Although these medications are generally considered to have fewer muscle-relaxing effects than benzodiazepines, they can still increase sedation and may worsen breathing problems in susceptible individuals.

Over-the-counter sleep aids often contain sedating antihistamines, which can cause similar effects. Alcohol can further increase sedation and should be used cautiously, particularly when combined with sleep medications.

Muscle Relaxants

Muscle relaxants prescribed for back pain, muscle spasms, or neurological conditions may increase airway collapse during sleep by relaxing the muscles of the throat and tongue. Some medications used to treat nerve pain, including gabapentin and pregabalin, may also increase drowsiness and contribute to breathing difficulties in certain people, especially when taken with opioids or other sedating medicines.

If you are diagnosed with sleep apnea, your healthcare provider may recommend monitoring your symptoms more closely after starting these medications.

Can Any Medications Improve Sleep Apnea?

No medication is currently considered a replacement for established sleep apnea treatments such as CPAP therapy, oral appliances, or lifestyle changes. However, some medications may improve sleep apnea indirectly by treating conditions that contribute to it.

Weight-Loss Medications

Excess weight is one of the strongest risk factors for OSA. For people living with obesity, prescription weight-loss medications may reduce sleep apnea severity by helping achieve meaningful and sustained weight loss.

Newer medications, including GLP-1 receptor agonists, have been shown to produce substantial weight loss in many patients. They are available in both injectable and oral formulations and lower blood sugar by triggering insulin, while reducing appetite and slowing digestion to help you feel full longer.

As body weight decreases, fat around the upper airway also decreases, making breathing during sleep more stable. Although weight loss can significantly improve sleep apnea, many people still require ongoing treatment, particularly if other factors such as airway anatomy contribute to the condition.

Blood Pressure Medications

Certain blood pressure medications may benefit in the management of sleep apnea in selected patients. For example, spironolactone can reduce fluid retention, including fluid that may collect around the upper airway overnight. Studies show that clearing out this fluid can slightly improve breathing for patients who have both sleep apnea and resistant hypertension.

Medications Used Alongside CPAP

Researchers continue to investigate medications that may complement CPAP therapy in selected patients.

For example, acetazolamide has been studied for its ability to stimulate breathing and reduce certain types of breathing events, particularly in people with central sleep apnea or mixed sleep-disordered breathing.

These medications are used only in specific situations under specialist supervision and are not suitable for most people with OSA. This is because these medications target the brain, not the throat; they work by tricking the brain into breathing faster. While this helps central sleep apnea, it cannot open a physically collapsed or blocked airway found in standard OSA.

Medication Interactions Can Increase the Risk

Sometimes it is not a single medication that causes problems but the combination of several medicines with similar effects.

Taking an opioid together with a sleeping tablet, benzodiazepine, muscle relaxant, or alcohol can significantly increase the risk of excessive sedation and slowed breathing. Older adults are particularly vulnerable because they may process medications more slowly and are more sensitive to their effects.

For this reason, it is important that every healthcare professional involved in your care knows about all the medications you take, including over-the-counter medicines, herbal supplements, and vitamins. Your pharmacist can also review your medication list and identify combinations that may increase the risk of breathing problems.

Do You Think a Medication Is Affecting Your Sleep?

If your sleep has changed since starting a new medication, don't ignore the symptoms. Warning signs include:

• Louder or more frequent snoring
• Pauses in breathing noticed by a partner
• Gasping or choking during sleep
• Morning headaches
• Worsening daytime sleepiness
• Difficulty concentrating
• Feeling unrefreshed despite sleeping through the night

These symptoms do not necessarily mean your medication is the cause, but they should be discussed with your healthcare provider.

Do not stop taking a prescribed medication without medical advice. Suddenly stopping medications such as opioids or benzodiazepines can lead to serious withdrawal symptoms and may be dangerous.

Instead, your healthcare provider can review your medications, assess whether they may be contributing to your symptoms, and recommend the safest approach. This might involve changing the dose, adjusting when you take the medication, switching to an alternative treatment, or arranging a sleep study if sleep apnea is suspected.

Looking After Your Sleep and Your Health

Many medications can influence breathing during sleep, but the benefits of treatment often outweigh the potential risks when medicines are used appropriately. The key is making sure your healthcare provider knows if you have sleep apnea, or if you develop symptoms after starting a new medication.

With careful medication review, appropriate treatment of sleep apnea, and regular follow-up, most people can safely manage both their underlying medical conditions and their sleep health. If you have concerns about a medicine affecting your breathing at night, speak with your healthcare provider or pharmacist before making any changes. Working together, you can find a treatment plan that supports both your overall health and a good night's sleep.