What is the appropriate use of chronic medications in the perioperative setting?

Mineralocorticoid supplementation is not necessary, because endogenous production is not suppressed by corticosteroid therapy.11 Although a recent systematic review suggests that routine stress-dose steroids might not be indicated, high-quality prospective data are needed before abandoning this strategy due to complications of acute adrenal insufficiency compared to the risk of a brief corticosteroid burst.

Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)

Nonselective cyclooxygenase (COX) inhibitors reversibly decrease platelet aggregation only while the drug is present in the circulation and should be stopped one to three days before surgery due to risk of bleeding.

Selective COX-2 inhibitors do not significantly alter platelet aggregation and can be continued for opioid-sparing perioperative pain control.

Both COX-2-selective and nonselective inhibitors should be held if there are concerns for impaired renal function.

Disease-Modifying Antirheumatic Drugs (DMARDs) and Biological Response Modifiers (BRMs)

Methotrexate increases the risk of wound infections and dehiscence. However, this is offset by a decreased risk of post-operative disease flares with continued use. It can be continued unless the patient has medical comorbidities, advanced age, or chronic therapy with more than 10 mg/day of prednisone, in which case the drug should be stopped two weeks before surgery.12

Azathioprine, leflunomide, and sulfasalazine are renally cleared with a risk of myelosuppression; all of these medications should be stopped. Long half-life of leflunomide necessitates stopping it two weeks before surgery; azathioprine and sulfasalazine can be stopped one day in advance. The drugs can be restarted three days after surgery, assuming stable renal function.13

Anti-TNF-α (adalimumab, etanercept, infliximab), IL1 antagonist (anakinra), and anti-CD20 (rituximab) agents should be stopped one week before surgery and resumed 1-2 weeks afterward, unless risk of complications from disease flareup outweighs the concern for wound infections and dehiscence.14

Herbal Medicines

It is estimated that as much as a third of the U.S. population uses herbal medicines. These substances can result in perioperative hemodynamic instability (ephedra, ginseng, ma huang), hypoglycemia (ginseng), immunosuppression (echinacea, when taken for more than eight weeks), abnormal bleeding (garlic, ginkgo, ginseng), and prolongation of anesthesia (kava, St. John’s wort, valerian). All of these herbal medicine should be stopped one to two weeks before surgery.15,16

Back to the Case

The patient’s Carbidopa/Levodopa should be continued. Celecoxib can be continued if her renal function in stable. If aspirin is taken for a history of coronary artery disease or percutaneous coronary intervention, it should be continued, if possible. Clonidine should be continued or changed to a patch if an extended NPO period is anticipated. Ginkgo, lisinopril, and sulfasalazine should be stopped.

Hospitalization does not provide the luxury of stopping estradiol in advance, so it might be continued with chemical DVT prophylaxis for up to 35 days after surgery. The patient should receive 50-75 mg of IV hydrocortisone during surgery and an additional 25 mg the following day, in addition to her usual prednisone 10 mg/day. She can either receive half her usual NPH dose the morning of surgery with a 5% dextrose infusion in the operating room, or the NPH should be held altogether.

Bottom Line

Perioperative medication use should be tailored to each patient, balancing the risks and benefits of individual drugs. High-quality trials are needed to provide more robust clinical guidelines. TH

Dr. Levin is a hospitalist at the University of Colorado Denver.

References

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