Tramadol - what are the strengths available for tramadol?

just to be more in depth tramadol comes in many forms, including:

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capsules
tablets
extended-release tablets
extended-release capsules
chewable tablets
low-residue and/or uncoated tablets that can be taken by the sublingual and buccal routes
suppositories
effervescent tablets and powders
ampoules 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 sublingual 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
tablets and capsules containing paracetamol (acetaminophen) and aspirin and other agents
Tramadol has been experimentally used in the form of an ingredient in multi-agent topical gels, creams, and solutions for nerve pain, rectal foam, concentrated retention enaema, and a skin plaster (transdermal patch) quite similar to those used with lidocaine.

Tramadol has a characteristic taste which is mildly bitter but much less so than morphine and codeine. Oral and sublingual drops and liquid preparations come with and without added flavouring. Its relative effectivness via transmucousal routes (sublingual, buccal, rectal) is around that of codeine, and, like codeine, it is also metabolised in the liver to stronger metabolites (see below).

The maximum dosage for tramadol in any form is 400 mg/day. Certain manufacturers or formulations have lower maximum doses. For example, Ultracet (37.5 mg/325 mg tramadol/APAP tablets) is capped at 8 per day (300 mg/day). Other popular formulations such as Ultram ER are available in 100, 200, and 300 mg/day doses. Patients with impaired liver function or using SSRIs should consult with their doctor regarding adjusted dosing.

this was taken from: http://en.wikipedia.org/wiki/Tramadol