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Does Penicillin G Potassium Interact with Triamterene And Hydrochlorothiazide?

Penicillin G Potassium and Triamterene And Hydrochlorothiazide have a major drug interaction according to U.S. FDA drug labeling data. Potassium-containing medications may promote serum potassium accumulation and result in hyperkalemia, especially in patients with renal insufficiency. The mechanism involves potassium retention. 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
Major
Triamterene And Hydrochlorothiazide Class
Thiazide Diuretic
Management
Close medical supervision required
Data Source
U.S. FDA via OpenFDA

How This Interaction Works

The interaction between Penicillin G Potassium and Triamterene And Hydrochlorothiazide occurs because potassium retention. Clinically, this means potassium-containing medications may promote serum potassium accumulation and result in hyperkalemia, especially in patients with renal insufficiency. This is classified as a major interaction, meaning it could cause serious harm if not properly managed. Your healthcare provider may need to adjust dosages, substitute one medication, or increase monitoring frequency.

What To Tell Your Doctor or Pharmacist

If you are taking Penicillin G Potassium and your doctor is considering prescribing Triamterene And Hydrochlorothiazide (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 how frequently you should be monitored while these are co-prescribed
  • Ask whether any dosage adjustments are needed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Penicillin G Potassium(Penicillin G Potassium)+💊 Triamterene And Hydrochlorothiazide(Triamterene And Hydrochlorothiazide)

Severity & Interaction Details

⚠️
major
Use with caution — major interaction
Serious risk of clinically significant harm. Generally avoid; if used, monitor closely.
Severity scale
MinorContra
On record
Yes
Drug A class
—
Drug B class
Thiazide Diuretic
Source
NLP:triamterene and hydrochlorothiazide

What this means in plain English

Potassium-containing medications may promote serum potassium accumulation and result in hyperkalemia, especially in patients with renal insufficiency.

What the FDA label says

"Potassium retention"

📖 Source: NLP:triamterene and hydrochlorothiazide

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Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine. For informational purposes only. Always consult your pharmacist or physician.