Plectranthus amboinicus, commonly known as Indian borage or Cuban oregano, has a longstanding presence in traditional medicine systems, particularly in South Asia and Africa. It is traditionally used to address a range of ailments, including those affecting the urinary system, such as urinary tract infections (UTIs), kidney discomfort, and as a mild diuretic. The leaves are often prepared as infusions or decoctions believed to help "cleanse" the urinary tract and promote urination, thereby assisting in the removal of toxins and alleviating mild symptoms of urinary discomfort.

Despite these traditional uses, the scientific evidence supporting the efficacy of Plectranthus amboinicus for urinary system health is limited. Some in vitro and animal studies have shown that extracts of the plant may possess mild antimicrobial and anti-inflammatory properties, which could theoretically be beneficial in cases of urinary tract infections. However, these studies are preliminary, and there is a lack of robust clinical trials in humans that specifically evaluate its effects on urinary system conditions.

In summary, while there is a traditional basis for the use of Plectranthus amboinicus in supporting urinary health, the current scientific evidence is not sufficient to fully validate its efficacy for this purpose. Its use for urinary support should thus be regarded as primarily traditional, with only a modest level of supporting evidence.