Efficacy and safety of outpatient parenteral antibiotic therapy in patients with infective endocarditis: a meta-analysis

Safety and efficacy of outpatient parenteral antimicrobial therapy: A systematic review and meta-analysis of randomized clinical trials

BACKGROUND

Outpatient parenteral antimicrobial therapy (OPAT) offers an alternative to inpatient (hospital bed-based) treatment of infections that require intravenous administration of antimicrobials. This meta-analysis aimed to summarise the evidence available from randomised controlled trials (RCTs) regarding the efficacy and safety of OPAT compared to inpatient parenteral antimicrobial therapy.

METHODS

We searched the Cochrane Library, MEDLINE, Embase, PubMed, and Web of Sciences databases for RCTs comparing outpatient versus inpatient parenteral antimicrobial therapy. We included studies without restrictions on language or publication year. Eligibility was reviewed independently by two assessors, and data extraction was cross validated. We evaluated bias risk via the Cochrane tool and determined the evidence certainty using GRADE. Meta-analysis was conducted using a random effects model. The protocol of this review was registered on PROSPERO (CRD42023460389).

RESULT

Thirteen RCTs, involving 1,310 participants were included. We found no difference in mortality (Risk Ratio [RR] 0.54, 95% Confidence Interval [CI] 0.23 to 1.26; P = 0.93), treatment failure (RR 1.0, CI 0.59 to 1.72; P = 0.99), adverse reaction related to antimicrobials (RR 0.89, CI 0.69 to 1.15; P = 0.38), and administration device (RR 0.58, CI 0.17 to 1.98; P = 0.87) between outpatient and inpatient parenteral antimicrobial therapy. The overall body of evidence had a low level of certainty.

CONCLUSION

Existing evidence suggests OPAT is a safe and effective alternative to inpatient treatment. Further RCTs are warranted for a thorough comparison of inpatient and outpatient parenteral antimicrobial therapy with a high level of certainty.

Successful Integration of Clinical Pharmacists in an OPAT Program: A Real-Life Multidisciplinary Circuit

Outpatient parenteral antimicrobial therapy (OPAT) programs encompass a range of healthcare processes aiming to treat infections at home, with the preferential use of the intravenous route. Although several barriers arise during the implementation of OPAT circuits, recent cumulative data have supported the effectiveness of these programs, demonstrating their application in a safe and cost-effective manner. Given that OPAT is evolving towards treating patients with higher complexity, a multidisciplinary team including physicians, pharmacists, and nursing staff should lead the program. The professionals involved require previous experience in infectious diseases treatment as well as in outpatient healthcare and self-administration. As we describe here, clinical pharmacists exert a key role in OPAT multidisciplinary teams. Their intervention is essential to optimize antimicrobial prescriptions through their participation in stewardship programs as well as to closely follow patients from a pharmacotherapeutic perspective. Moreover, pharmacists provide specialized counseling on antimicrobial treatment technical compounding. In fact, OPAT elaboration in sterile environments and pharmacy department clean rooms increases OPAT stability and safety, enhancing the quality of the program. In summary, building multidisciplinary teams with the involvement of clinical pharmacists improves the management of home-treated infections, promoting a safe self-administration and increasing OPAT patients’ quality of life.