Missed a Dose of Sunosi (Solriamfetol)? Here's What to Do
Medically reviewed by Lauren Okafor | MD, The Frank H Netter MD School of Medicine, Loyola University Medical Center on July 26th, 2026.
Published on July 24th, 2026. Updated on July 26th, 2026.
Key takeaways
Take Sunosi as soon as you remember, but only if it is still morning or early enough to avoid sleep interference at night.
If it is already afternoon or evening, skip the missed dose entirely and resume your normal schedule the next morning.
Never double up on doses to make up for a missed one, as this increases the risk of side effects like elevated heart rate and blood pressure.
Sunosi should be taken within one hour of waking for best results, so building a morning routine can help prevent missed doses.
If you frequently miss doses or feel the medication is not working well, a licensed clinician can help adjust your plan.
What Sunosi Does and Why Timing Matters
Sunosi is the brand name for solriamfetol, a prescription medication approved to improve wakefulness in adults with excessive daytime sleepiness linked to narcolepsy or obstructive sleep apnea. It works by inhibiting the reuptake of dopamine and norepinephrine in the brain, which promotes alertness and helps people stay awake during the day.
Because Sunosi is a wakefulness-promoting agent, when you take it matters almost as much as whether you take it. The medication reaches peak levels in the bloodstream within two hours and has a half-life of roughly seven hours. That means a dose taken late in the afternoon could still be active in your system well into the night, potentially making it difficult to fall asleep or stay asleep.
For this reason, the prescribing guidelines recommend taking Sunosi within one hour of waking in the morning. This built-in timing window is not arbitrary; it is designed to align the medication's peak activity with the hours when you most need alertness, while allowing it to wear off by bedtime.
What to Do Right Away After a Missed Dose
If you realize you have missed your Sunosi dose, the first step is to check the time. Here is a simple way to think about it:
- Early in the day: If it is still morning or only a couple of hours past your usual dose time, go ahead and take it. The medication should still clear your system before you need to sleep.
- Later in the afternoon or evening: Skip the missed dose entirely. Taking Sunosi too late risks disrupting your sleep that night, which can worsen fatigue the following day.
- The next morning: Resume your normal schedule at your regularly prescribed dose.
The key principle is this: a missed dose is a setback for one day, not a crisis. Protecting your nighttime sleep is worth more than squeezing in a late dose.
Why Doubling Up Is Never the Answer
It might seem logical to take two doses to compensate for a missed one, but this is not safe with Sunosi. Solriamfetol affects dopamine and norepinephrine pathways, and higher-than-prescribed doses can cause a range of side effects, some of which may be serious.
Possible Side Effect |
Why It May Worsen with a Double Dose |
|---|---|
Elevated heart rate (tachycardia) |
Increased norepinephrine activity raises cardiovascular demand |
High blood pressure |
Norepinephrine has a direct pressor effect on blood vessels |
Anxiety or irritability |
Excess dopamine and norepinephrine can overstimulate the nervous system |
Decreased appetite |
Higher drug levels may suppress hunger more strongly |
Difficulty sleeping |
More medication means a longer window of wakefulness-promoting activity |
If you accidentally take a double dose and experience chest pain, a very rapid heartbeat, severe anxiety, or other worrying symptoms, contact a healthcare provider or poison control promptly.
Habits That Help You Stay on Schedule
People with narcolepsy or obstructive sleep apnea often deal with morning grogginess, which can make it easy to forget a medication dose right after waking. A few practical strategies may help.
Pair the dose with a morning anchor. Taking Sunosi at the same time as another consistent habit, such as brushing your teeth or making coffee, can make it feel automatic rather than optional.
Use a phone alarm or pill reminder app. Setting a daily alarm labeled with the medication name removes the need to rely on memory alone, especially on days when your routine is disrupted.
Keep the medication visible. Storing Sunosi in a spot you see every morning, such as next to the coffee maker or on the bathroom counter, serves as a natural visual cue.
Prepare the night before. Placing the pill bottle somewhere prominent before bed means you will encounter it first thing in the morning, even if you wake up feeling groggy.
None of these strategies is foolproof, but combining two or three of them significantly reduces the chance of a missed dose becoming a recurring problem.
When to Talk to Your Clinician
Occasionally missing a dose of Sunosi is not usually a cause for alarm. However, there are situations where it is worth reaching out to a licensed clinician.
If you are missing doses frequently because the medication's side effects are unpleasant, your prescriber may be able to adjust the dose or explore alternative treatment options. Sunosi is available in 75 mg and 150 mg strengths, and some people tolerate a lower dose better while still experiencing meaningful benefit.
If you feel that Sunosi is no longer managing your symptoms effectively even when taken correctly, that is also worth discussing. Sleep disorders can change over time, and a treatment plan that worked well at first may need to be revisited.
Finally, if you are considering stopping Sunosi altogether, do not just skip doses and hope for the best. Talk to your clinician about how to discontinue the medication safely and whether alternative therapies for excessive daytime sleepiness might be appropriate for your situation. Doctronic's 24/7 platform, which has achieved 99.2% treatment plan alignment with board-certified physicians across more than 22 million consultations, can be a convenient starting point for that conversation.
Frequently Asked Questions
Take it as soon as you remember, provided it is still early in the day. Sunosi can interfere with nighttime sleep if taken too late, so most clinicians recommend skipping the dose if it is already afternoon. Resuming your normal schedule the next morning is the safest approach.
No. Taking a double dose of Sunosi is not recommended and may increase the risk of side effects such as elevated heart rate, high blood pressure, decreased appetite, and anxiety. Always stick to your prescribed dose and schedule, and speak with your clinician if you have concerns.
There is no universal cutoff, but many clinicians suggest avoiding Sunosi after noon or early afternoon. Because solriamfetol is a wakefulness-promoting agent, taking it too late in the day may cause difficulty falling or staying asleep at night. Your prescriber can give personalized guidance.
Missing a single dose of Sunosi is unlikely to cause withdrawal symptoms for most people. However, you may notice a return of excessive sleepiness on that day. If you miss multiple doses or stop suddenly after long-term use, talk to your clinician before making any changes.
Yes. Doctronic offers free AI consultations and $39 video visits available 24 hours a day, 7 days a week. As the first AI legally authorized to practice medicine in Utah, Doctronic can help answer medication questions and connect you with a board-certified clinician when needed.
The Bottom Line
Missing a dose of Sunosi (solriamfetol) happens, and in most cases the fix is straightforward: take it early in the day if you remember in time, or skip it and restart the next morning. Never double up on doses. Staying consistent with your morning routine is the best way to avoid missed doses. With over 22 million AI consultations completed, Doctronic makes it easy to get fast, reliable guidance on medication questions any time of day. This article is informational and is not a medical diagnosis. Confirm with a licensed clinician, especially for new, worsening, or high-risk symptoms.
Related articles
Get sleep health advice
Chat Now