What intravenous anesthetic administered by the anesthesiologist has a powerful respiratory depressant effect sufficient to cause apnea and cardiovascular depression?

Thiopental sodium.

Explanation:

Anesthesia may be defined as the state of the loss of temporary sensation that are generally done by the use of chemicals. This is mainly done for the surgical procedure.

Thiopental sodium is the general anesthesia and considered as the most safe anesthesia that can be given to the patients. The Thiopental sodium is given intravenously and cause the loss of sensation within 30 to 45 minutes after the injection. This anesthesia is a high depressant and moves from the brain to the different part of body to cause consciousness.

Thus, the answer is Thiopental sodium.