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Piperacillin-induced magnesium and potassium loss in intensive care unit patients
Kees H Polderman1, Armand R J Girbes
1Department of Intensive Care, Vrije Universiteit Medical Centre, PO Box 7057, 1007 MB Amsterdam, The Netherlands. k.polderman@vumc.nl
Objective:
Broad spectrum penicillins such as piperacillin are used extensively in the intensive care unit (ICU) because of their wide bacterial spectrum and low level of toxicity. Although some cases of interstitial nephritis induced by piperacillin have been reported, this problem is thought to be rare. However, in view of the large number of other risk factors for renal disorders that are frequently present in ICU patients, we speculated that ICU patients might be more at risk for renal side effects. We therefore decided to measure serum electrolyte levels in patients before and after piperacillin administration.
Design:
Prospective observational study.
Setting:
University teaching hospital.
Patients And Participants:
Forty-three consecutive patients with normal renal function treated with piperacillin; 40 patients treated with other antibiotics.
Results:
Serum levels of magnesium (Mg), potassium (K) and, to a lesser degree, calcium (Ca) decreased significantly in patients treated with piperacillin, but not in patients treated with other antibiotics ( p<0.01). This decrease was especially pronounced in a subgroup of patients concurrently treated with furosemide.
Conclusions:
We conclude that treatment with piperacillin may cause or aggravate electrolyte disorders and tubular dysfunction in ICU patients even when serum creatinine levels remain normal.
Insights
Piperacillin treatment in intensive care units (ICUs) can lead to significant decreases in serum magnesium, potassium, and calcium levels. These electrolyte disturbances may occur even with normal kidney function, highlighting a potential risk for ICU patients.
Area of Science:
- Pharmacology
- Nephrology
- Critical Care Medicine
Background:
- Broad-spectrum penicillins like piperacillin are vital in ICUs due to their efficacy and safety profile.
- While piperacillin-induced interstitial nephritis is considered rare, ICU patients face numerous renal disorder risk factors.
- The potential for piperacillin to cause renal side effects in this vulnerable population warrants investigation.
Purpose of the Study:
- To investigate the impact of piperacillin administration on serum electrolyte levels in intensive care unit (ICU) patients.
- To determine if piperacillin use is associated with electrolyte imbalances, particularly in patients with pre-existing renal risk factors.
Main Methods:
- A prospective observational study was conducted at a university teaching hospital.
- Serum electrolyte levels were measured in 43 ICU patients before and after piperacillin administration.
- A control group of 40 patients treated with other antibiotics was included for comparison.
Main Results:
- Patients treated with piperacillin showed significant decreases in serum magnesium, potassium, and calcium levels (p<0.01).
- No significant electrolyte changes were observed in the control group receiving other antibiotics.
- The electrolyte disturbances were more pronounced in patients also treated with furosemide.
Conclusions:
- Piperacillin treatment is associated with electrolyte disorders, including hypomagnesemia, hypokalemia, and hypocalcemia, in ICU patients.
- These electrolyte imbalances can occur even when serum creatinine levels remain within the normal range.
- Piperacillin may contribute to or worsen tubular dysfunction in critically ill patients.