Pregabalin Side Effects: What to Expect and When to Call Your Doctor

Pregabalin (Lyrica) is an effective medication for neuropathic pain, fibromyalgia, and seizures, but like all medications, it can cause side effects. Most people tolerate pregabalin well — especially at lower doses — but knowing what to expect can help you recognize normal adjustment effects versus warning signs that need medical attention.

The Most Common Side Effects of Pregabalin

These are the side effects that patients most frequently experience, particularly when starting pregabalin or increasing the dose:

• Dizziness (30% of patients): One of the most common effects. Usually most pronounced when starting the medication and typically improves as your body adjusts. Avoid driving or operating machinery until you know how pregabalin affects you.
• Drowsiness/somnolence (23% of patients): Sedation is particularly common at higher doses. Taking your dose at night can help manage daytime drowsiness. Some patients find this effect lessens after a few weeks.
• Weight gain and peripheral edema: Fluid retention and weight gain are real concerns with pregabalin, particularly at higher doses or when used with certain diabetes medications (like pioglitazone or rosiglitazone). Monitor your weight and report significant changes to your doctor.
• Dry mouth: Staying well hydrated can help. Sugar-free gum or candy can provide temporary relief.
• Blurred or double vision: Visual disturbances are reported by some patients and are generally dose-dependent. Report persistent vision changes to your doctor.
• Memory problems and difficulty concentrating: Some patients report cognitive "fogginess," especially at higher doses.
• Coordination problems (ataxia): Unsteadiness or difficulty with balance, particularly in older adults. This increases the risk of falls.
• Euphoria (~4% of patients): A minority of patients experience a mild "high" or feeling of well-being. This was one of the reasons pregabalin was classified as a Schedule V controlled substance.

Serious Side Effects: When to Seek Immediate Help

Some pregabalin side effects are serious and require immediate medical attention:

• Angioedema (serious allergic swelling): Swelling of the face, lips, tongue, throat, or neck can be life-threatening. If you experience this after taking pregabalin, stop the medication immediately and seek emergency care or call 911.
• Severe allergic reactions: Rash, hives, blisters, or difficulty breathing after starting pregabalin require immediate evaluation. Stop pregabalin and contact your healthcare provider.
• Respiratory depression: Pregabalin can cause slow or shallow breathing, especially when taken with opioid pain medications, benzodiazepines, or other CNS depressants. This combination can be life-threatening. Seek emergency care immediately for severe drowsiness or difficulty breathing.
• Suicidal thoughts or unusual mood changes: Like all antiepileptic medications, pregabalin carries a class warning about increased risk of suicidal thoughts or behavior. Report any new or worsening depression, unusual mood changes, or thoughts of self-harm to your doctor immediately.
• Kidney damage: Pregabalin is primarily eliminated by the kidneys unchanged. Patients with pre-existing kidney problems need dose adjustments, and new kidney problems may require stopping the drug. Report significant changes in urination or unexplained swelling.

Important Boxed Warnings

Pregabalin carries several FDA-required warnings that all patients should know:

• Respiratory depression with CNS depressants: The FDA requires a warning about the risk of serious breathing problems when pregabalin is used with opioids, benzodiazepines, alcohol, or other medications that slow the central nervous system. In studies from 2012–2017, twelve deaths from respiratory depression involving gabapentinoids (including pregabalin) were reported — all in patients with at least one additional risk factor.
• Suicidality: As an antiepileptic drug, pregabalin carries a class-wide warning about the increased risk of suicidal thoughts. This affects all antiepileptic medications, not just pregabalin specifically.

Tips to Minimize Side Effects

Several strategies can help reduce the impact of pregabalin side effects:

• Start low and go slow: Your doctor will typically start at a low dose and gradually increase, which reduces dizziness and drowsiness during adjustment.
• Take your largest dose at bedtime to minimize daytime sedation.
• Avoid alcohol: Alcohol amplifies dizziness and sedation.
• Monitor your weight: Regular weigh-ins help catch fluid retention early.
• Don't stop suddenly: Abrupt discontinuation causes withdrawal. Always taper under your doctor's guidance.

Pregabalin and Pregnancy or Breastfeeding

The safety of pregabalin during pregnancy is unclear — some studies have suggested potential harm to the fetus, and the drug has been associated with birth defects in male offspring in animal studies. If you become pregnant while taking pregabalin, notify your prescriber immediately. For breastfeeding, there are insufficient data on the risk to infants. Discuss the benefits and risks with your healthcare provider.

For more on what medications and substances to avoid while taking pregabalin, see our guide to Pregabalin Drug Interactions.