Royal plans shifted this week as the 76-year-old monarch made a brief hospital visit — without Queen Camilla. Buckingham Palace later issued a statement.

King Charles III visited The London Clinic on Thursday after experiencing temporary side effects from cancer treatment, according to The Sun. Buckingham Palace confirmed that he returned to Clarence House the same day and postponed engagements scheduled for Thursday and Friday. Queen Camilla did not accompany him to the hospital.

A palace spokesperson stated, “Following scheduled and ongoing medical treatment for cancer this morning, The King experienced temporary side effects that required a short period of observation in hospital.”

Sources close to the Palace reportedly said the episode was “a most minor bump in a road” and that the King is “very much heading in the right direction.” Officials added that such side effects are not uncommon in cancer patients.

By Thursday evening, the King resumed work from his study, reviewing state papers and making calls. While the Palace may adjust some upcoming engagements, it still expects the State Visit to Italy in April to proceed as planned.