A Phase 1, First Time in Human (FTIH) Study to Evaluate GSK3352589, a REarranged During Transfection (RET) Growth Factor Receptor Tyrosine Kinase Inhibitor, in Healthy Volunteers

Inclusion Criteria:

* Between 18 and 55 years of age inclusive, at the time of signing the informed consent.
* Healthy as determined by the investigator based on a medical evaluation including medical history, physical examination, laboratory tests and cardiac monitoring. - History of regular bowel habits
* Male or Female of non-childbearing potential.
* Capable of giving signed informed consent which includes compliance with the requirements and restrictions.

Exclusion Criteria:

* ALT and bilirubin \>1.5 x upper limit of normal (ULN) (isolated bilirubin \>1.5xULN is acceptable if bilirubin is fractionated and direct bilirubin \<35%).
* Previous Diagnosis of IBS
* Estimated Glomerular Filtration Rate \<60 millilter per minute per 1.73 square meter (mL/min/1.73m\^2)
* Current or chronic history of liver disease, or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones)
* History of Gastroesophageal reflux disease (GERD), dyspepsia, Gastrointestinal (GI) bleeding, diverticulitis, diverticular stricture or other intestinal strictures, GI surgery that could affect motility
* Unwillingness or inability to follow the procedures outlined in the protocol