Inclusion Criteria:

- Women surgically or naturally menopausal,

- Experiencing moderate to severe hot flushes, AND

- Elect to undergo stellate ganglion block procedure.

Exclusion Criteria:

- Subjects who are currently sick,

- Subjects have acute infections or cardiac compromise,

- Subjects who have local infections of the anterior neck region, severe

- Subjects who have pulmonary disease,

- Subjects who are anticoagulated,

- Subjects who are on hormone therapy,

- Subjects who have a blood clotting disorder,

- Subjects who have an American Society of Anesthesiologists (ASA) physical status
score of 3 or higher (severe systemic disease, not incapacitating),

- Subjects who have allergic reactions to local anesthetics and/or contrast dyes,

- Subjects who have past or present diagnosis of psychosis,

- Subjects who have current diagnosis of depression, OR

- Subjects who have current substance or alcohol abuse.