The lethal dosage of zolpidem tartrate depends on several factors, including the individual's tolerance, gender and weight. Doses greater than 150 milligrams per kilogram of body weight are usually fatal. A dose of 10,200 milligrams is likely a lethal dose for an adult weighing 150 pounds.
Zolpidem tartrate is sold in 10 milligram tablets. Therefore, it takes more than a thousand pills to cause a fatal overdose according to these figures. However, side effects and allergic reactions to the drug mean that smaller dosages are potentially fatal or able to cause long-lasting health issues. It is possible that lower doses of zolpidem tartrate are deadly if mixed with alcohol, recreational drugs or other prescription medications. Exercise caution with all medications, and seek medical help if side effects or overdose occur.