HomePhenobarbitalPhenobarbital + Dextroamphetamine Saccharate Amphetamine Aspartate Monohydra

Does Phenobarbital Interact with Dextroamphetamine Saccharate Amphetamine Aspartate Monohydra?

Phenobarbital and Dextroamphetamine Saccharate Amphetamine Aspartate Monohydra have a moderate drug interaction according to U.S. FDA drug labeling data. Amphetamines may reduce the effects of this drug. Monitor for reduced efficacy. The mechanism involves amphetamines reduce drug effects. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.

Severity
Moderate
Management
Monitor for effects
Data Source
U.S. FDA via OpenFDA

How This Interaction Works

The interaction between Phenobarbital and Dextroamphetamine Saccharate Amphetamine Aspartate Monohydra occurs because amphetamines reduce drug effects. Clinically, this means amphetamines may reduce the effects of this drug. monitor for reduced efficacy. This is classified as a moderate interaction. While it may not require stopping either medication, your healthcare provider should be aware you are taking both so they can monitor for potential effects and adjust treatment if necessary.

What To Tell Your Doctor or Pharmacist

If you are taking Phenobarbital and your doctor is considering prescribing Dextroamphetamine Saccharate Amphetamine Aspartate Monohydra (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Ask whether any dosage adjustments are needed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Phenobarbital(Donnatal)+💊 Dextroamphetamine Saccharate Amphetamine Aspartate Monohydra(Mydayis)

Severity & Interaction Details

🟡
moderate
Be aware — moderate interaction
Documented interaction with manageable risk. May require dose adjustment or monitoring.
Severity scale
MinorContra
On record
Yes
Drug A class
Drug B class
Source
NLP:dextroamphetamine saccharate, amphetamine aspartate monohydrate, dextroamphetamine sulfate, and amphetamine sulfate

What this means in plain English

Amphetamines may reduce the effects of this drug. Monitor for reduced efficacy.

About Phenobarbital and Dextroamphetamine Saccharate Amphetamine Aspartate Monohydra

You may recognize them by the brand names Donnatal and Mydayis. Both medications are taken by mouth. Dextroamphetamine Saccharate Amphetamine Aspartate Monohydra additionally carries an FDA boxed warning, the FDA's strongest safety alert.

What the FDA label says

"Amphetamines reduce drug effects"

📖 Source: NLP:dextroamphetamine saccharate, amphetamine aspartate monohydrate, dextroamphetamine sulfate, and amphetamine sulfate

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Data integrity: Every interaction shown is extracted directly from official U.S. FDA drug labeling via openFDA and the U.S. National Library of Medicine (NIH) — no interactions are invented, inferred, or manually edited. Maintained by CheckDrugInteractions.com. See our methodology or report a correction at support@checkdruginteractions.com.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine, supplemented with a small number of well-established interactions from curated clinical references. For informational purposes only. Always consult your pharmacist or physician.