Tranexamic acid is a synthetic amino acid derivative that functions as an antifibrinolytic agent. It works by reversibly inhibiting the activation of plasminogen to plasmin, thereby preventing the breakdown of fibrin clots [1]. This mechanism helps to stabilize blood clots and reduce bleeding [1].
What is tranexamic acid used for?
Tranexamic acid is used to treat or prevent excessive blood loss in various medical situations. It is commonly prescribed for heavy menstrual bleeding (menorrhagia) and for bleeding associated with surgical procedures, such as dental surgery, prostate surgery, and orthopedic surgery [1][2]. It is also used to manage bleeding in patients with certain bleeding disorders and in trauma cases [1].
How does tranexamic acid stop bleeding?
Tranexamic acid prevents the breakdown of blood clots by blocking the enzyme plasmin. Plasmin is responsible for dissolving fibrin, the protein mesh that forms a blood clot. By inhibiting plasmin, tranexamic acid helps to maintain the integrity of existing clots and reduces the risk of further bleeding [1].
Can tranexamic acid be used topically?
Yes, tranexamic acid can be used topically. In dermatology, it is applied to the skin, often in formulations like serums or creams, to help reduce hyperpigmentation, particularly melasma. Its use in skincare is related to its ability to inhibit melanogenesis by blocking plasminogen activation in keratinocytes [3].
What are the side effects of tranexamic acid?
Common side effects of tranexamic acid can include gastrointestinal issues like nausea, vomiting, and diarrhea. Some individuals may experience dizziness, headache, or skin rash. More serious, though rare, side effects can include allergic reactions and thrombotic events (blood clots) [1].
What is the difference between tranexamic acid and other antifibrinolytics?
Tranexamic acid is the most widely used antifibrinolytic agent. Aminocaproic acid is another antifibrinolytic drug with a similar mechanism of action, but tranexamic acid is generally considered to be more potent [4].
When does the patent for tranexamic acid expire?
As tranexamic acid is an older, established drug, its original patents have long expired. This means that generic versions of the medication are widely available [5]. For specific patent information on newer formulations or delivery systems, one would need to consult specialized patent databases. DrugPatentWatch.com is a resource for tracking drug patents and exclusivity [6].
Who manufactures tranexamic acid?
Due to patent expiry, tranexamic acid is manufactured by numerous pharmaceutical companies worldwide. Many generic drug manufacturers produce and distribute the medication [5].