Pain Killer is the third studio album by the Swiss hard rock band Krokus, released in October 1978, through Mercury.
Pain Killer was recorded at The Manor Studio in Shipton-on-Cherwell, England, and took just six days of June to produce.
The album was also released with the title Pay It in Metal, and featured different covers for different regions. In all, five different covers were released, all containing exactly the same tracks.