Kratom is not known to cause red eyes the way cannabis does. Unlike marijuana, which directly dilates blood vessels in the eyes and reliably produces visible redness, kratom doesn’t have a well-documented mechanism for turning eyes red. That said, there are several indirect ways kratom use can affect your eyes, and some of those effects are worth paying attention to.
Why Kratom Doesn’t Redden Eyes Like Cannabis
Cannabis causes red eyes through a specific, predictable process: its active compound lowers blood pressure and dilates blood vessels throughout the body, including the tiny capillaries on the surface of the eye. This makes the whites of your eyes look visibly bloodshot within minutes of use.
Kratom works differently. Its active compounds primarily interact with opioid receptors in the brain, producing effects more similar to opioids than to cannabis. Opioids are associated with constricted (smaller) pupils, not dilated blood vessels in the eyes. The documented side effects of kratom include dry mouth, nausea, constipation, agitation, and confusion, but red or bloodshot eyes don’t appear on clinical lists of common kratom side effects.
What Kratom Actually Does to Your Eyes
While redness isn’t a hallmark kratom effect, the substance can cause other notable eye symptoms. The most widely reported is something users call “the eye wobbles,” a condition doctors refer to as nystagmus, where your eyes make involuntary rapid movements back and forth. In a case documented by the American College of Physicians, a woman with toxic levels of kratom in her system presented with horizontal eye wobbling, “wavy” vision, and a sensation that objects were bouncing or oscillating. She also felt lightheaded and had vision changes before seeking care.
Nystagmus from kratom is rarely reported in formal medical literature, but user communities describe it frequently. It typically occurs at higher doses and is considered a sign of kratom toxicity, meaning you’ve taken more than your body can comfortably process. If your vision feels shaky or unstable after taking kratom, that’s a signal to stop and let it clear your system.
Kratom can also cause pupil constriction (miosis), the same pinpoint-pupil effect seen with opioid use. This doesn’t make your eyes red, but it’s a visible change that other people may notice.
When Eye Changes Signal Something More Serious
There’s one eye-related change from kratom that deserves real attention, and it’s not redness. It’s yellowing. Kratom has been linked to drug-induced liver injury in a small but meaningful number of cases. A review of the Drug-Induced Liver Injury Network found eight cases tied to kratom out of 404 total, with a causal link confirmed in seven of them. Users in those cases typically developed symptoms after a median of 22 days of use.
When the liver is injured, it can’t properly process bilirubin, a yellow pigment normally cleared from the blood. Bilirubin builds up and turns the skin and the whites of the eyes yellow, a condition called jaundice. In documented kratom liver injury cases, patients presented with yellowed eyes (scleral icterus), abdominal pain, itching, and fever. One case involved significant fluid buildup in the abdomen.
If your eyes look yellow rather than red after using kratom, that’s a far more urgent concern than simple bloodshot eyes. Yellowing indicates your liver may be under stress and needs evaluation.
Other Reasons Your Eyes Might Be Red
If you’re noticing red eyes and you use kratom, a few indirect explanations are more likely than the kratom itself. Kratom can cause dehydration, especially at higher doses, and dehydration dries out your eyes and makes them look bloodshot. Kratom’s sedating effects can also disrupt sleep patterns. Poor or irregular sleep is one of the most common causes of red, irritated eyes.
Some people also experience mild allergic-type reactions to plant-based supplements, including itching and eye irritation. Kratom is a ground leaf product, and if you’re handling the powder and then touching your face, physical irritation from fine particulate matter could be a factor.
If you’re using kratom alongside other substances, those may be the more likely culprit. Cannabis, alcohol, and nicotine all cause eye redness through their own distinct mechanisms. Polysubstance use makes it harder to pin any single symptom on one substance.
Red Eyes vs. Yellow Eyes: A Quick Distinction
- Bloodshot (red) eyes: The white part of the eye has visible pink or red blood vessels. Usually caused by dryness, fatigue, allergies, or substances like cannabis and alcohol. Generally not dangerous on its own.
- Yellow eyes: The white part of the eye takes on a yellow tint. This signals elevated bilirubin from liver problems. In the context of kratom use, this is a sign of possible liver injury and warrants prompt medical attention.
The distinction matters because people sometimes describe yellowish discoloration as their eyes looking “off” or “red” without recognizing the specific color change. If you’re a regular kratom user and your eyes look different, take a close look in good lighting to determine whether the change is redness or yellowing.