Th A side was a huge number one country hit for Carl Butler and his wife Pearl, it was later covered by Dolly Parton, Jerry Lee Lewis and a host of others. But lurking on the B-side was ‘Wonder Drug’, an ode to a cure for heartbreak that took on druggier connotations with white line-fevered truck drivers celebrating the “wonder drug” that cures all ills. The song even rhymes “penicillin”. Nice going and a rasping geetar break too.