Tranexamic Acid

What Is Tranexamic Acid?

Tranexamic acid is a medication that belongs to a drug class called antifibrinolytics. It works by helping to stabilize blood clots that have already formed, which makes it useful in situations where reducing blood loss is important.

Tranexamic acid is used, depending on the formulation and clinical situation, for purposes such as:

• Managing heavy menstrual bleeding (cyclic, heavy periods)
• Reducing or preventing bleeding in patients with hemophilia during and after tooth extraction
• Reducing bleeding in certain surgical or trauma settings, under direct medical supervision

Brand names include Lysteda (oral tablets) and Cyclokapron (injection), among others.

Available formulations typically include:

• Oral tablets (Tranexamic Acid 500mg)
• Intravenous (IV) injection solutions, used only in medical settings by trained healthcare professionals

The specific formulation, strength, and setting of use depend entirely on the condition being treated.

What Is the Recommended Dosage of Tranexamic Acid?

Dosage varies significantly based on:

• The condition being treated (for example, heavy menstrual bleeding versus bleeding prevention around dental surgery in hemophilia)
• The patient’s age
• Body weight, particularly for weight-based IV dosing
• Kidney function, since tranexamic acid is cleared by the kidneys and doses are adjusted for impaired renal function
• Whether the medication is given orally or intravenously

Oral tablets are typically taken multiple times a day for a limited number of days per treatment cycle; injectable forms are given only in supervised medical or dental settings, often calculated by body weight.

Dosing must always be determined and adjusted by a licensed medical specialist based on kidney function and the specific condition being treated — do not estimate or adjust your own dose, and never take more than prescribed.

How Tranexamic Acid Works

The body has a natural process for breaking down blood clots once they are no longer needed, called fibrinolysis. Tranexamic acid works by blocking part of this breakdown process, which allows existing clots to remain stable for longer and helps reduce ongoing or excessive bleeding.

Tranexamic acid helps control bleeding associated with a specific condition; it does not treat the underlying cause of that bleeding. For example, in heavy menstrual bleeding, it reduces blood loss during a cycle but does not address the root cause of the heavy bleeding itself, which is a separate area a specialist may need to evaluate.

Is a Prescription Required to Obtain Tranexamic Acid Online?

Yes. Tranexamic acid is a prescription-only medication in most countries, including the United States. Injectable forms are administered only in clinical settings by healthcare professionals.

Before starting tranexamic acid, patients should consult a licensed medical specialist, such as:

• An obstetrician-gynecologist, for heavy menstrual bleeding
• A hematologist, for bleeding disorders such as hemophilia
• A dentist or oral surgeon working alongside a hematologist, for dental procedures in patients with bleeding disorders

Important safety notes:

• Only obtain medications from licensed, regulated pharmacies.
• Be cautious of any online source offering this medication without requiring a prescription.
• Never use a veterinary formulation intended for animals.
• Because tranexamic acid carries meaningful risks (see Section 7), it should never be started, adjusted, or continued without ongoing specialist involvement.

Side Effects of Tranexamic Acid

Common Side Effects

• Nausea, vomiting, or diarrhea
• Headache
• Back, muscle, or joint pain
• Sinus or nasal symptoms

Serious Side Effects

Seek prompt medical attention, or emergency care, if you experience:

• Signs of a blood clot, such as swelling, warmth, or pain in one leg (possible deep vein thrombosis); sudden shortness of breath or chest pain (possible pulmonary embolism); or sudden vision changes, weakness on one side of the body, or difficulty speaking (possible stroke)
• Sudden vision changes or loss of vision
• Seizures
• Signs of an allergic reaction, such as rash, hives, swelling of the face or throat, or difficulty breathing
• Severe dizziness

This is not a complete list. Contact your specialist promptly about any new or concerning symptom.

Drug Interactions

Tranexamic acid can interact with other medications in ways that may increase risk. Categories to discuss with your specialist include:

• Combined hormonal contraceptives (containing both estrogen and progestin), which can further increase the risk of blood clots when combined with tranexamic acid
• Clotting factor products, such as Factor IX complex concentrates or anti-inhibitor coagulant concentrates, which may increase thrombosis risk when combined with tranexamic acid
• Tissue plasminogen activators (tPA) and similar clot-dissolving medications, since tranexamic acid can reduce their effectiveness
• Tretinoin (all-trans retinoic acid), used in certain leukemia treatment, due to a possible increased risk of clotting complications
• OTC medications and herbal or dietary supplements, particularly any that affect blood clotting

Always provide your licensed medical specialist and pharmacist with a complete, current list of everything you take, including hormonal contraceptives.

Safety & Important Considerations

• Blood clot (thromboembolic) risk: Tranexamic acid works by stabilizing clots, which carries an inherent risk of increasing the chance of unwanted blood clots, including in the legs, lungs, brain, or eyes. This risk is discussed in prescribing information and should be carefully weighed by your specialist, especially if you have personal or family risk factors for clotting.
• History of blood clots: Patients with a personal history of blood clots or clotting disorders require careful specialist evaluation before use.
• Kidney disease: Since the drug is cleared by the kidneys, impaired kidney function requires dose adjustment and closer monitoring.
• Pregnancy and breastfeeding: Use during pregnancy or breastfeeding should be discussed directly with a specialist, who can weigh individual benefits and risks.
• Vision changes: Because visual disturbances have been associated with tranexamic acid, your specialist may recommend periodic eye examinations, especially with longer-term use, and any sudden vision change should be reported immediately.
• Seizure risk: This has been reported, particularly with higher intravenous doses, and is a reason to seek immediate medical attention if it occurs.
• Color vision: Patients with a known defect in color vision may require additional evaluation before use.
• Monitoring: Your specialist may recommend periodic check-ins or testing based on your individual health profile and how long you will be using the medication.

This section is not exhaustive. Share your complete medical history with your specialist before starting treatment.

Who This Medication Is For

Tranexamic acid is generally prescribed for individuals with a specific bleeding-related condition where reducing blood loss is clinically important — for example, people with heavy menstrual bleeding, or people with hemophilia undergoing dental procedures. Its use in surgical or trauma settings is determined by treating medical teams based on the clinical situation. Appropriateness for any individual patient is determined by a licensed specialist through a full clinical evaluation, not through self-diagnosis.

Who Should Not Take Tranexamic Acid

Tranexamic acid is generally not appropriate for:

• Patients with active blood clots or a history of blood clots or clotting disorders (such as deep vein thrombosis, pulmonary embolism, or certain eye vein/artery occlusions)
• Patients with subarachnoid hemorrhage (a type of bleeding around the brain)
• Patients with active abnormal blood clotting occurring throughout the body
• Patients with a known hypersensitivity or allergy to tranexamic acid
• Patients taking combined hormonal contraceptives, in the case of oral tablets specifically approved for heavy menstrual bleeding, due to increased clotting risk
• Patients advised against it by their specialist for other individual health reasons

This is a general list, not a complete one. A full medical history and risk assessment by a licensed specialist is necessary before starting this medication.

What to Do If You Miss a Dose

• If you take oral tranexamic acid on a scheduled course (such as during your menstrual period) and miss a dose, take it as soon as you remember, unless it is close to your next scheduled dose.
• Do not take a double dose to make up for a missed one.
• If you are receiving tranexamic acid by injection, dosing is managed directly by your healthcare team, so a “missed dose” situation would be handled by them.
• If you are unsure what to do, contact your licensed medical specialist or pharmacist.

Related medications to Tranexamic Acid

Tranexamic Acid is an antifibrinolytic medicine used in specific bleeding-related treatment settings. A directly related page is Tranexamic Acid-Etamsylate, which contains an additional hemostatic ingredient. This medicine should be placed within a bleeding or hemostatic treatment category rather than general gastrointestinal treatment.

Storage Instructions

• Store oral tablets at room temperature, away from excessive heat and moisture.
• Keep tablets in their original container; do not cut, crush, or chew them unless specifically instructed otherwise.
• Injectable forms are stored and handled according to strict protocols within medical facilities and are not intended for home storage or self-administration.
• Keep all medication out of reach of children and pets, ideally in a secured location.

Disclaimer:

This page is for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Patients must consult a licensed medical specialist before starting, changing, or stopping treatment with tranexamic acid. Treatment decisions must be based on a full clinical evaluation by a qualified specialist.