Tramadol is a strong painkiller classified as a "weak opioid," used to treat moderate to severe pain. It is generally considered stronger than mild painkillers but less potent than stronger opioids like morphine. Tramadol is fast-acting, with effects usually starting within 30 minutes to an hour and lasting about six hours. On a dose-by-dose basis, it has roughly one-tenth the potency of morphine. It is roughly equivalent in strength to codeine at low doses but less effective than morphine for severe pain. Typically, the maximum recommended dosage is 400 mg per day due to its potency and risk of addiction. Tramadol works by blocking pain signals and also has effects on serotonin and norepinephrine reuptake, enhancing pain relief. It is available in different forms, including tablets, capsules, drops, and injections. Because of its strength and addictive potential, it is usually prescribed with caution and for short-term use unless other painkillers are ineffective.