Overview
Tranexamic acid is an antifibrinolytic agent used to prevent or reduce bleeding in patients with hemophilia undergoing dental procedures. It works by inhibiting plasminogen activation and plasmin activity, thereby stabilizing blood clots. The injection formulation is specifically indicated for short-term use around tooth extractions in hemophilia patients.
Mechanism of Action
Tranexamic acid competitively inhibits the activation of plasminogen to plasmin and directly inhibits plasmin activity at higher concentrations. This antifibrinolytic action prevents the breakdown of fibrin clots, thereby reducing bleeding.
Indications
- Short-term use (2-8 days) to reduce or prevent hemorrhage during and following tooth extraction in patients with hemophilia
- Reduction of need for replacement therapy in hemophilia patients undergoing dental procedures
Common Doses
- 100 mg/mL concentration for injection
- Typical dose: 10 mg/kg body weight
Dosage
Administered intravenously around dental procedures in hemophilia patients. Typical dosing involves 10 mg/kg immediately before surgery followed by maintenance doses every 6-8 hours for 2-8 days post-procedure.
Contraindications
- Neuraxial administration (intrathecal or epidural injection)
- Patients with subarachnoid hemorrhage
- Patients with active intravascular clotting
- Hypersensitivity to tranexamic acid or any formulation ingredients
Side Effects
- Nausea, vomiting, diarrhea
- Hypotension and orthostatic symptoms
- Thromboembolic events
- Visual impairment
- Convulsions and seizures
- Headache and mental status changes
- Myoclonus
- Rash and hypersensitivity reactions
- Dizziness
Interactions
- Increased thrombotic risk when used with other procoagulant agents
- Potential additive effects with other antifibrinolytic drugs
- Caution with hormonal contraceptives due to increased thrombotic risk
Counseling Points
- This medication is for intravenous use only and must be administered by healthcare professionals
- Report any signs of blood clots such as chest pain, shortness of breath, or leg swelling immediately
- Notify healthcare provider of any visual changes, dizziness, or seizure activity
- Inform dentist or surgeon about all medications before dental procedures
- Carry medical identification indicating hemophilia diagnosis and medication use