Strenth : 100mg / 200 mg / 225 mg tablets Tramadol is used primarily to treat mild severe pain, both acute and chronic. Its analgesic effects take about one hour to come into effect and 24 hours to peak after oral administration with an immediate-release formulation. [12] On a dose-by-dose basis tramadol has about one-tenth the potency of morphine and is approximately equally potent when compared to pethidine and codeine.[14] For pain moderate in severity its effectiveness is equivalent to that of morphine; for severe pain it is less effective than morphine.[12] These painkilling effects peak at about 3 hours, post-oral administration and last for approximately 6 hours.[13] Available dosage forms include liquids, syrups, drops, elixirs, effervescent tablets and powders for mixing with water, capsules, tablets including extended release formulations, suppositories, compounding powder, and injections.