Can taking valtrex (valacyclovir) result in urinary retention?

Not likely.: Urinary retention is not described as a side effect or adverse reaction to valacyclovir (valtrex). If you are experiencing urinary retention, please see your physician to look for all possible causes. The us food and drug administration constantly updates its database of adverse reactions at: http://www.Fda.Gov/medwatch.

Not directly, but...: Urinary retention is not a known side effect of Valtrex. However, it may be a sign of acute kidney injury. Risk factors include: the elderly, poor water intake, other medications that may injure the kidneys, and those who already have kidney disease.