All benzodiazepines have an estimated dose that is equivalent to doses of other benzodiazepines. Unlike opiates, equivalence conversions between different benzodiazepines are not defined or required by the FDA. Evidence-based information on benzodiazepine equivalents is limited and many different sources report dissenting information. For this reason, some equivalence rates are listed in a range, as they are estimates and mostly based on clinical observation and judgement. People who take prescribed benzodiazepines are unique and will not all have identical experiences. An equivalent dose that works for one person may be too low or too high for another person taking the exact same drug and dose.