Trans-Tranilast is primarily used as an anti-allergic and anti-inflammatory agent. It is effective in treating conditions like bronchial asthma, allergic rhinitis, and atopic dermatitis by inhibiting the release of chemical mediators from mast cells. Additionally, it is applied in the medical field to prevent restenosis after coronary angioplasty by suppressing the proliferation of vascular smooth muscle cells. Its anti-fibrotic properties also make it useful in treating keloids and hypertrophic scars, where it helps reduce excessive collagen deposition.