Singer Miley Cyrus, who suffered a severe allergic reaction last month, will be given medical care during her British tour and will have "a nurse on standby".

The "Wrecking Ball" hitmaker, who was hospitalised last month after suffering a severe allergic reaction to Cephalexin, an antibiotic prescribed for flu, is on the mend but isn't taking any chances with her health, repeorts femalefirst.co.uk.

"Miley has been under the supervision of two nurses, who are monitoring her progress 24 hours a day at her home," said a source.

"She already has a nurse on standby for when she lands in Britain. The worst thing about her illness is that there are times when she feels entirely fine but then suddenly her symptoms flare up again."

"The reaction could still affect her over the next few days but Miley is determined to put on a great show for her British fans," added the source.

The European leg of the tour is set to start at London's O2 Arena May 6.

It is said the star has been prescribed steroids, while staying hydrated with intravenous drips and using an oxygen tank to assist her breathing.