Difficult to Cure is the fifth studio album by the British hard rock band, Rainbow, and was released in 1981. The album marked the further commercialization of the band's sound, with Ritchie Blackmore once describing at the time his appreciation of the band Foreigner.
The album material was started with singer Graham Bonnet still in the band, getting as far as recording an early version of "I Surrender", before Bonnet left the band due to his dissatisfaction over the material. American singer Joe Lynn Turner, formerly of Fandango was recruited and sang over already completed musical tracks. Turner stated that, because of this, he was singing in higher keys than he would do normally (and would do subsequently).
"I Surrender" would be the band's highest charting single in the UK, reaching No. 3.
A remastered CD reissue was released in May 1999, with packaging duplicating the original vinyl release.
Of the five musicians who play on this album, four of them have been members of Deep Purple at some point in their careers (with only Blackmore and Glover and Glover and Airey at the same time). Only drummer Bobby Rondinelli has never been a member of Deep Purple. Joe Lynn Turner joined the band in 1990 to replaced Ian Gillan and only recorded one album, Slaves and Masters, with the band; before he was replaced by a returning Gillan. Don Airey would join the band in 2002, replacing former keyboardist Jon Lord, and has remained in the band since.
The original 1981 LP and cassette releases had the title of the fifth track as "Vielleicht Das Nachster Zeit (Maybe Next Time)". This was a mis-translation from the German, which was corrected on later releases. However, the "corrected" version still contains multiple spelling errors, as the correct German for "Maybe Next Time" is "Vielleicht beim nächsten Mal". The laughter at the end of the last track is unmistakably that of Oliver Hardy. On the original LP, the laughter is an endless loop as it plays in the run-out groove, while on the CD it loops a few times before stopping.