Inclusion Criteria:

- Prostate cancer patients treated with androgen deprivation and experiencing hot
flashes.

- Karnofsky performance status ≥70%

- Age ≥18 years

- Informed consent obtained, signed and dated before specific protocol procedures

Exclusion Criteria:

- Other therapy for hot flashes

- Mental condition rendering the patient unable to understand the nature, scope, and
possible consequences of the study

- Patient unlikely to comply with protocol, i.e. uncooperative attitude, inability to
complete the diary, inability to return for follow-up visits, and unlikely to
complete the study.