Will damiana show in a standard u.a. drug test?

Since it is a herbal supplement, it's very doubtful it would be tested for in a standard urinalyses.

"The use of damiana in cultural and traditional settings may differ from concepts accepted by current Western medicine. When considering the use of herbal supplements, consultation with a primary health care professional is advisable. Additionally, consultation with a practitioner trained in the uses of herbal/health supplements may be beneficial, and coordination of treatment among all health care providers involved may be advantageous.

Damiana is also known as Turnera diffusa, Mexican damiana, old woman's broom, and herba de la pastora.

Damiana has been used as an aphrodisiac, to treat headaches, and to aid in the control of bed wetting.

Damiana has not been evaluated by the FDA for safety, effectiveness, or purity. All potential risks and/or advantages of damiana may not be known. Additionally, there are no regulated manufacturing standards in place for these compounds. There have been instances where herbal/health supplements have been sold which were contaminated with toxic metals or other drugs. Herbal/health supplements should be purchased from a reliable source to minimize the risk of contamination"