Combination

Mixing NyQuil and Pregabalin (Lyrica)

CombinationDepressant
Verdict

Unsafe · Delirium plus sedation

The doxylamine in NyQuil at anything above a normal dose produces genuine delirium — confusion, memory gaps, and hallucinations you cannot tell from reality. Layering a sedative on top removes the coordination and the awareness you would need to keep yourself safe through it, and makes the state very hard to tell apart from an overdose from the outside.

  1. Do not use NyQuil to sleep off or come down from something else. This is how most of these cases start.
  2. Stay with them. Keep the room cool and free of things to fall onto or against.
  3. Hot dry skin, a temperature, or hallucinations mean hospital. Anticholinergic delirium has a specific treatment and does not simply wear off safely.
What “Unsafe” means
In an emergency, call 911911Never Use AlonePoison Control
What to do
  • Say what was taken and how much.Responders need it, and in most US states Good Samaritan laws protect both of you from drug possession charges when you call for an overdose.
  • Unresponsive: put them on their side, tilt the head back, and stay until help arrives.Never leave someone alone to “sleep it off”.
  • Never Use Alone 1-800-484-3731Stays on the line and sends help if you stop responding.
  • Full steps: what to do if it is already happeningOverdose signs, the recovery position, what to say on the call, and whether you can be charged for making it.
  • Poison Control 1-800-222-1222Free and 24/7, for “is this bad?” before it becomes an emergency.

Can you take NyQuil with Lyrica?

NyQuil contains acetaminophen, DXM and doxylamine. The doxylamine in NyQuil at anything above a normal dose produces genuine delirium — confusion, memory gaps, and hallucinations you cannot tell from reality. Layering a sedative on top removes the coordination and the awareness you would need to keep yourself safe through it, and makes the state very hard to tell apart from an overdose from the outside. MixSafe rates NyQuil with Lyrica as "Unsafe" — risk of serious physical or psychological harm. Not recommended under any circumstances. Sources: the Drug Facts labels on DailyMed, the TripSit combination chart and MixSafe research. Educational information, not medical advice.

What is in it

NyQuil
Acetaminophen + DXM + Doxylamine. Doxylamine is checked as diphenhydramine (Benadryl): both are sedating antihistamines of the same kind. NyQuil Severe also contains phenylephrine, a decongestant MixSafe has no data for.

Delirium plus sedation

Unsafe

NyQuil + Lyrica

What to do
  1. 01Do not use NyQuil to sleep off or come down from something else.This is how most of these cases start.
  2. 02Stay with them.Keep the room cool and free of things to fall onto or against.
  3. 03Hot dry skin, a temperature, or hallucinations mean hospital.Anticholinergic delirium has a specific treatment and does not simply wear off safely.
Signs it is happening
  1. Talking to people who are not there, or no memory of the last stretch of time
  2. Hot, dry, flushed skin with no sweating, and a rising temperature
  3. Racing heart, inability to urinate, severe confusion
Why this happens

The doxylamine in NyQuil at anything above a normal dose produces genuine delirium — confusion, memory gaps, and hallucinations you cannot tell from reality.

Layering a sedative on top removes the coordination and the awareness you would need to keep yourself safe through it, and makes the state very hard to tell apart from an overdose from the outside.

More on anticholinergic delirium

Ingredient by ingredient

  • NyQuil (Doxylamine) + LyricaUnsafe

    The doxylamine in NyQuil is checked as diphenhydramine (Benadryl), the closest drug MixSafe has data for, so this answer and any dose in it are diphenhydramine's.

    This carries a real seizure risk and makes passing out more likely. Avoid this combination at recreational doses.

    There is a significant risk of seizures from this combination. The combination is likely to increase each other’s negative side effects, such as nausea, dizziness, and loss of consciousness. At higher dosages, pregabalin is likely to increase diphenhydramine’s deliriant effects, inhibition, and risk of injury. Medical dosages are not reported to be a concern.

    Source: TripSit drug combination chart

    More on DoxylamineMore on Lyrica

  • NyQuil (DXM) + LyricaUnsafe

    Each makes the other stronger, and together they can knock you out and raise the risk of a seizure. Avoid this combination.

    Pregabalin and DXM may increase each other’s effects such as inhibition, dizziness, sedation. At higher doses this can lead to unexpected loss of consciousness. Both drugs have seizure concerns which is greatly increased in combination.

    Source: TripSit drug combination chart

    More on DXMMore on Lyrica

  • NyQuil (Acetaminophen) + LyricaLow risk, no synergy

    Neither substance is expected to meaningfully change the other. Both still carry their own individual risks.

    No specific interaction is documented. Acetaminophen's main risk is dose-dependent liver injury, so the thing to watch in any combination is total daily intake across all products (roughly 4g/24h) and anything else straining the liver.

    Sources: Prescott LF. Paracetamol, alcohol and the liver. Br J Clin Pharmacol. 2000 · Acetaminophen: A Liver Killer or Thriller

    More on AcetaminophenMore on Lyrica

Sources

Ingredient lists checked 2026-09-27. Formulas change and store brands differ, so the Drug Facts box on your own packet is the final word.

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