A 32-year-old woman presents to the emergency department after passing a single episode of melaena. She has had no haematemesis or syncope and has no significant past medical history.
On assessment:
HR 82 beats/min
BP 124/76 mmHg
Hb 128 g/L
Urea 5.2 mmol/L
No evidence of cardiac failure or liver disease
No further bleeding occurs during observation
Her Glasgow-Blatchford Score is calculated as 1.
What is the single most appropriate management?