What are the indications for tranexamic acid?

Tranexamic Acid Indications

Tranexamic acid is indicated for post-partum hemorrhage (within 3 hours of birth), trauma with significant bleeding (within 3 hours of injury), hemophilia-related dental procedures, and perioperative bleeding reduction in various surgical procedures.

Primary Life-Saving Indications

Post-Partum Hemorrhage

• WHO strongly recommends early intravenous tranexamic acid (within 3 hours of birth) for all women with clinically diagnosed post-partum hemorrhage following vaginal birth or caesarean section 1
• Clinically diagnosed PPH is defined as blood loss >500 mL after vaginal birth, >1000 mL after cesarean section, or any blood loss compromising hemodynamic stability 1
• Should be given in all cases of PPH regardless of etiology (uterine atony, genital tract trauma, or other causes) 1
• Critical timing: Benefit decreases by 10% for every 15-minute delay; no benefit after 3 hours, and potentially harmful beyond this window 1
• Dosing: 1 g IV over 10 minutes, with second 1 g dose if bleeding continues after 30 minutes or restarts within 24 hours 1

Trauma with Significant Hemorrhage

• Indicated for trauma patients who are bleeding or at risk of significant bleeding, administered as soon as possible and within 3 hours of injury 2
• Loading dose of 1 g IV over 10 minutes, followed by 1 g infusion over 8 hours 2
• Based on CRASH-2 trial evidence showing reduced mortality when given early after traumatic injury 1, 3
• Should be administered en route to hospital if feasible 2

FDA-Approved Indication

Hemophilia-Related Dental Procedures

• FDA-approved for patients with hemophilia undergoing tooth extraction to reduce hemorrhage and decrease need for replacement therapy 4
• Dosing: 10 mg/kg IV immediately before extraction, then 10 mg/kg 3-4 times daily for 2-8 days post-procedure 4
• Infuse no faster than 1 mL/minute to avoid hypotension 4

Surgical Indications (Evidence-Based)

Orthopedic Surgery

• Reduces perioperative blood loss and transfusion requirements in total hip and knee arthroplasty 5, 6, 7
• Safe in high-risk TKA patients including those with prior thromboembolic events, renal failure, and atrial fibrillation, though caution advised in patients with seizure history or visual disturbances 8
• Effective in various orthopedic procedures including fracture surgery and arthroscopic procedures 5

Cardiac Surgery

• Reduces postoperative blood loss by 29-54% and transfusion requirements in cardiac surgery with cardiopulmonary bypass 6, 7
• Maximum total dose of 100 mg/kg recommended, especially in patients >50 years due to neurotoxicity concerns 3

Urologic Surgery

• Reduces intraoperative and postoperative bleeding in transurethral resection of prostate (TURP) 9
• Effective in transurethral prostatic surgery 7

Facial Aesthetic Surgery

• Significantly reduces blood loss, surgical time, postoperative edema, and ecchymosis in rhinoplasty, rhytidectomy, and blepharoplasty 10
• Can be administered via intravenous, topical, or local infiltration routes 10

Other Surgical Procedures

• Orthotopic liver transplantation 7
• General emergency and urgent surgery 1

Other Medical Indications

Gynecologic Bleeding

• Heavy menstrual bleeding (menorrhagia): reduces menstrual blood loss by 34-58% 6, 7
• Placental bleeding and bleeding irregularities from contraceptive implants 6

Gastrointestinal Bleeding

• Upper gastrointestinal hemorrhage: reduces mortality by 40% in meta-analysis 7

Ophthalmologic

• Traumatic hyphaema: reduces rebleeding rates 6, 7

Other Conditions

• Hereditary angioneurotic edema 6, 7

Critical Contraindications

Absolute contraindications 4, 3:

• Active intravascular clotting
• Subarachnoid hemorrhage (risk of cerebral edema and infarction)
• Known hypersensitivity to tranexamic acid
• Known thromboembolic event during pregnancy (for PPH indication) 1

Important Caveats

• Dose adjustment required in renal impairment: reduce to 10 mg/kg twice daily for creatinine 1.36-2.83 mg/dL, daily for 2.83-5.66 mg/dL, and every 48 hours for >5.66 mg/dL 4
• Avoid concomitant use with pro-thrombotic agents (Factor IX concentrates, hormonal contraceptives) 4
• Should not be mixed with penicillin-containing solutions 4
• While generally safe regarding VTE risk, modest increase in stroke/TIA observed in patients with prior thromboembolism 8