According to this Jane's Addiction bio, he used heroin for the first time in September 1991 that could mean the solo was overdubbed later. However, John has also said he remembers being on heroin when he played the guitar solo for “Ten to Butter Blood Voodoo”.
John has mentioned recording these songs while the Chili Peppers were writing Blood Sugar Sex Magik. Released on the album “Niandra LaDes And Usually Just A T-Shirt” Recorded at: 8505 Hollywood Blvd, Los Angeles, CA (John’s home) Additional Musicians: Randy Ruff, Abbie Rude, Toni Oswald
