, Volume 20, Issue 1, pp 136–148 | Cite as

The role of combination medical therapy in the treatment of acromegaly




Uncontrolled acromegaly results in approximately 2-fold excess mortality. Pituitary surgery is first-line therapy, and medical treatment is indicated for persistent disease. While cabergoline and pegvisomant are used in select patients, somatostatin receptor ligands (SRLs) remain the cornerstone of medical treatment. Management of patients poorly responsive to SRLs is therefore, challenging. The purpose of this review is to highlight the options for combination medical therapy in the treatment of acromegaly, with an emphasis on efficacy and safety.


All original articles/abstracts detailing combination medical therapy in acromegaly were identified from a PubMed search.


Studies reviewed included retrospective and open-label prospective studies. While the combination of SRL and cabergoline was generally well tolerated, a lower baseline insulin-like growth factor-1 (IGF-1) level was the best predictor of efficacy; this combination may be most effective in patients with mildly elevated IGF-1. SRL-pegvisomant combination normalized IGF-1 in the majority of patients; continued efficacy despite individual drug dosing reduction was also reported. The risk of significant liver enzyme elevation was, however, higher than that reported with SRL monotherapy; close monitoring is recommended. Data on pegvisomant-cabergoline combination is limited, but this may be an option in the setting of SRL intolerance. Reports on temozolomide used in combination with other medical therapies in patients with aggressive GH-secreting tumors are also summarized.


While more prospective, randomized controlled trials on long-term efficacy and safety are needed, combination medical therapy remains a treatment strategy that should be considered for acromegaly patients poorly responsive to SRLs.


Acromegaly Combination medical therapy Somatostatin receptor ligand Dopamine agonist Growth hormone receptor antagonist 



The authors thank Shirley McCartney, Ph.D., Oregon Health & Science University, for editorial assistance with the manuscript.

Compliance with ethical standards

Conflict of Interest

The authors did not receive support for writing of this manuscript. Dr. Fleseriu is the principal investigator on research grants to Oregon Health & Science University from Chiasma, Ipsen, Novartis and Pfizer and an ad-hoc scientific consultant to Chiasma, Ipsen, Novartis and Pfizer. Dr. Dawn Shao Ting Lim has no conflict of interest.


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Departments of Medicine (Endocrinology) and Neurological Surgery, and Northwest Pituitary CenterOregon Health & Science UniversityPortlandUSA

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