Can diuretics be used for urinary retention?

Generally, diuretics are not recommended for urinary retention.

Urinary retention refers to the accumulation of urine in the bladder that cannot be voided normally. Its main causes include mechanical obstruction and dynamic (functional) obstruction. Diuretics primarily work by promoting urine production in the kidneys and increasing urine output; they are commonly used to treat conditions such as edema and hypertension to reduce fluid retention in the body. In cases of urinary retention, the problem is not insufficient urine production by the kidneys, but rather an obstruction preventing urine from being expelled, leading to urine buildup in the bladder. Using diuretics in such situations may cause the kidneys to produce even more urine, further increasing pressure within the bladder without addressing the underlying issue of impaired urine outflow. This could worsen patient discomfort and potentially lead to serious complications such as excessive bladder distension or even bladder rupture.

The key to managing urinary retention is promptly relieving the obstruction and restoring normal urination. Treatment options include stimulating urination, inserting a urinary catheter to drain the bladder, and other interventions. If urinary retention is caused by conditions such as benign prostatic hyperplasia, treatment should also target the underlying cause.

When performing catheterization, strict aseptic techniques must be followed to prevent infection. Additionally, it is important to ensure the catheter remains unobstructed and to avoid urine reflux.