Inclusion Criteria:

- Patients known to have gastric carcinoids associated with chronic atrophic gastritis
and hypergastrinaemia, and who attend the outpatient clinic of the investigator;

- Men, postmenopausal women, premenopausal women who have been sterilised by tubal
ligation, hysterectomy or bilateral oophrectomy, or premenopausal women using
reliable contraception: condom and spermicide or intrauterine device;

- Adults ≥ 18 years;

- Good general health; and

- Able to give fully-informed, written consent.

Exclusion Criteria:

- Women who are pregnant, lactating or using a steroid contraceptive;

- History of gastric surgery, apart from surgery for gastric carcinoids;

- Evidence of Zollinger-Ellison syndrome;

- Prolonged QTc interval (>450 msec);

- Certain medicines and herbal remedies taken during the 7 days before visit 1;

- Previous treatment with somatostatin; or

- Participation in other clinical trials of unlicensed medicines within the previous 3
months.