| A1 | Sleepchamber | 2:51 | ||
| A2 | 88 | 3:07 | ||
| B | Mutant Theory | 4:25 |
Mastered at National Sound Corporation, Detroit.
All tracks produced and arranged for Axis.
Published by Millsart (BMI) Detox (BMI)
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Labels wrongly list side A with a single track "Mutant Theory" and side B with 2 tracks "Sleepchamber" and "88".
In fact "Mutant Theory" is a single track on side B and side A contains the other 2 tracks.
Side B plays from the inside out.
This is the original release with black/beige label art, the repress has black/white labels.
| Title, Format | Label | Cat# | Country | Year | ||
|---|---|---|---|---|---|---|
| Tranquilizer EP (12", EP) | Network Records, Axis | NWKT 62, AX-001 | UK | 1992 | ||
| Tranquilizer EP (12", Promo, EP) | Axis | AX-001 | US | 1991 | ||
| Tranquilizer EP (12", EP, RP) | Axis | AX-001 | US | |||
| Tranquilizer EP (12", EP) | Axis | AX-001 | US | 1991 | ||
| Tranquilizer EP (12", EP) | Axis | AX-001 | US | 1991 |