Levothyroxine Sodium in Thyroidectomized Patients Taking Proton Pump Inhibitors

Completed · Phase 4

Conditions studied: Hypothyroidism;Postablative

In brief

This is an open-label therapeutic efficacy study of Tirosint (levothyroxine sodium) capsules in thyroidectomized patients taking proton pump inhibitors and levothyroxine, evaluating changes in serum levels of Thyroid Stimulating Hormone (TSH) upon switch to Tirosint with respect to baseline.

Key facts

Study ID

NCT03094416

Run by

IBSA Institut Biochimique SA

People needed

66

Starts

2018-07-30

Expected to finish

2020-06-15

Last updated by the study team

2022-04-05

Who can join

Age: 18 and older, up to 65. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• written informed consent duly read, signed and dated by the subject;
• aged ≥18 and ≤65 years;
• history of hypothyroidism due to total thyroidectomy;
• on stable LT4 doses for at least 6 weeks at screening (≥88 mcg daily and ≤250 mcg daily);
• TSH at screening ≥0.3 and ≤4.0 mIU/L;
• history of gastroesophageal reflux disease or associated gastrointestinal issues on prescription PPIs (i.e. omeprazole ≥20 mg daily, or esomeprazole ≥ 20 mg daily, or lansoprazole ≥ 15 mg daily, or pantoprazole ≥ 40 mg daily) for at least 8 weeks before screening visit and for whom chronic therapy with PPIs for the next 5 months has been prescribed;
• for women, adequate and continuative contraceptive measures until the end of the study, if not in menopause;
• reasonable assumption of understanding the study and willingness to take part to the study and to comply with protocol requirements.

You may not qualify if…

• suspected or ascertained non-compliance with LT4 or PPI therapy;
• subject requiring changes of levothyroxine dose;
• use of over-the-counter (OTC) PPIs;
• history of malabsorption or history of gastric bypass surgery, short-gut syndrome, inflammatory bowel disease and other conditions of the gastrointestinal tract that may affect drug absorption (e.g. celiac disease)3;
• multiple co-morbidities (e.g. cardiac heart failure, active arrhythmia or history of arrhythmia, particularly atrial fibrillation, uncompensated diabetes mellitus, uncorrected adrenal insufficiency, seriously compromised hepatic, renal and/or respiratory functions);
• neoplastic pathology, active or in remission for less than 5 years (excluding the basic thyroid pathology);
• terminal condition;
• parenteral or assisted enteral feeding;
• presence of any medical condition or other circumstances which would significantly affect the safety of the subject or decrease the chance of obtaining reliable data, achieving study objectives or completing the study;
• history of alcoholism, drug abuse or psychiatric diseases that could invalidate the informed consent or limit the subject compliance with protocol requirements;
• pregnant (positive urine pregnancy test at screening or baseline visits) or breast-feeding subject or subject planning a pregnancy in the next months;
• known hypersensitivity to the ingredients of the preparation involved in the study3;
• use of forbidden concomitant medications;
• regular consumption of soy and soy derivatives, cotton seed meals, walnuts, and dietary fibres;
• participation in other clinical studies during the 3 months prior to screening;
• presumption of poor reliability/cooperation;
• any reason which, in the opinion of the Investigator, would prevent the subject from participating in the study.

Where it is running

• California Head and Neck Specialists — La Jolla, California, United States
• Coastal Metabolic Research Centre — Ventura, California, United States
• Washington Hospital Center — Washington D.C., District of Columbia, United States
• MedStar Union Memorial Hospital — Baltimore, Maryland, United States
• NYC Health + Hospitals/ Queens — New York, New York, United States
• Diabetes & Endocrinology Consultants, PC — Morehead City, North Carolina, United States
• Carolina Ear Nose and Throat Clinic — Orangeburg, South Carolina, United States
• Virginia Commonwealth University — Richmond, Virginia, United States
• Stonesifer Endocrine Care & Clinical Research Inc., PS — Federal Way, Washington, United States

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.