Blood creatinine level. The blood creatinine level shows how well your kidneys are working. A high level may mean your kidneys are not working as they should. The amount of creatinine in the blood depends partly on the amount of muscle tissue you have.
Xanax is stronger. 0.5 mg of Xanax equals 10 mg of Valium. But Xanax is mostly effective for about 2 hours, then you may have to repeat the dose (and regular doses may cause addiction). Valium peak-level effects wear off after 1 hour, but it stays in blood longer, and continues working for about 12 hours.
.5 (or 1/2) mg. of Xanax is equal to 10 full milligrams of Valium. Klonopin is somewhere in the middle. People can become addicted to Xanax in THREE DAYS. Listen, these are ALL highly addictive, dangerous drugs that can cause WAY more problems than they supposedly solve. Addiction to benzodiazepines is far different than addiction to any other drug, legal or otherwise.