Tramadol

Tramadol comes in many types,such as
capsules (regular and extended release)
tablets (regular, extended release, chewable, low-residue and/or uncoated tablets that can be taken by the sublingual and buccal routes)
suppositories
effervescent tablets and powders
ampules of sterile solution for SC, IM, and IV injection
preservative-free solutions for injection by the various spinal routes (epidural, intrathecal, caudal, and others)
powders for compounding
liquids both with and without alcohol for oral and sub-lingual administration, available in regular phials and bottles, dropper bottles, bottles with a pump similar to those used with liquid soap and phials with droppers built into the cap