Pronunciation: tek-vay-lee
Generic name: teclistamab-cqyv
Dosage form: subcutaneous injection 30 mg/3 mL (10 mg/mL) , 153 mg/1.7 mL (90 mg/mL)
Drug class: Bispecific T-cell engagers (BiTE)

Medically reviewed by Melisa Puckey, BPharm. Last updated on May 2, 2025.

What is Tecvayli?

Tecvayli (teclistamab) is an immunotherapy used to treat multiple myeloma, a type of blood cancer. Tecvayli helps slow the progression of multiple myeloma, manage symptoms, and improve quality of life.  

Tecvayli is a bispecific antibody that can attach to two different types of cells at once: multiple myeloma cells and T-cells from the immune system. By connecting these cells, Tecvayli activates T-cells to attack and kill the cancer cells.

Tecvayli is used in patients with relapsed or refractory multiple myeloma, which is cancer that has returned or no longer responds to other treatments, and patients must have tried at least four prior lines of therapy.

Tecvayli is given as an injection under the skin (subcutaneous injection) weekly or every two weeks as a maintenance dose by your HCP (healthcare professional).

Tecvayli FDA approval

Tecvayli FDA approval was granted on October 25, 2022, based on positive results from  MajesTEC-1 (NCT04557098, NCT03145181), a Phase 1/2 single-arm study. The approval is an accelerated approval based on the response rate in clinical trials, and continued approval will depend on further results in the continuing trials.

Tecvayli FDA approval is as a treatment for:

• relapsed or refractory multiple myeloma in adults, and
• have received at least four prior lines of therapy, including a proteasome inhibitor, an immunomodulatory agent, and an anti-CD38 monoclonal antibody. 

What is multiple myeloma? 

Multiple myeloma is a type of blood cancer that affects plasma cells, a type of white blood cell found in the bone marrow. In multiple myeloma, abnormal plasma cells spread rapidly and replace normal cells in the bone marrow.

The multiple myeloma cells have large amounts of a protein on their surface called BCMA (B-cell maturation antigen). Tecvayli works by targeting these cells, binding to the BCMA proteins, and helping the immune system recognize and attack the cancer cells.

How does Tecvayli work?

Tecvayli mechanism of action is a bispecific T-cell engager (BiTE) antibody that targets both BCMA on multiple myeloma cells and CD3 on T-cells (immune cells). By simultaneously binding to these two antigens, Tecvayli helps T-cells to recognize and kill BCMA-expressing myeloma cells, leading to cytotoxic activity against the tumor.

Tecvayli REMS

Tecvayli is available under a special program called Risk Evaluation and Mitigation Strategy (REMS). Tecvayli REMS' goal is to prevent, monitor, and manage the serious risk of cytokine release syndrome (CRS)  and neurologic toxicity. This helps to ensure the benefits of this medicine outweigh its risks. 

See “What should I know about the Tecvayli REMS program?” for more information.

Tecvayli side effects

Common Tecvayli side effects

Common Tecvayli side effects may include:

• pain, bruising, swelling, or irritation where the medicine was injected;
• headache;
• nausea, diarrhea;
• tiredness, weakness;
• joint pain, muscle pain in the back, chest, arms, and legs;
• cold symptoms such as stuffy nose, sneezing, sore throat, or
• fever, chills, cough with mucus, chest pain, feeling short of breath.

Serious Tecvayli side effects

Get emergency medical help if you have signs of an allergic reaction, including hives, difficulty breathing, or swelling of your face, lips, tongue, or throat.

Tell your medical caregivers if you have signs of cytokine release syndrome (CRS), a serious side effect: fever, chills, trouble breathing, confusion, severe vomiting or diarrhea, fast or irregular heartbeats, feeling light-headed or very tired.

Tecvayli may cause other serious side effects. Call your doctor at once if you have:

• bruising, swelling, warmth, redness, oozing, or bleeding where an injection was given;
• neurological problems - headache, jerking muscle movements, rigid muscles, feeling restless, numbness and tingling, confusion, problems speaking, muscle spasms, tremors, double vision, changes in handwriting, problems walking, muscle weakness in the body or face, hearing loss, burning, throbbing, or stabbing pain;
• signs of infection or low white blood cell counts - cold symptoms such as stuffy nose, sneezing, sore throat, fever, night sweats, swollen glands, cough, wheezing, chest pain, mouth or skin sores, body aches, unusual tiredness; or
• liver problems--loss of appetite, nausea, vomiting, stomach pain (upper right side), tiredness, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Your cancer treatments may be delayed or permanently discontinued if you have certain side effects.

Related/similar drugs

Warnings

This medicine may cause side effects that are serious, life-threatening, or lead to death, including Cytokine Release Syndrome (CRS) and Neurologic problems. Call your HCP right away if you develop any of the signs or symptoms of CRS or neurologic problems listed below at any time during your treatment:

• Cytokine Release Syndrome (CRS). Call your doctor if you have symptoms of a serious side effect, such as fever, chills, trouble breathing, vomiting, or severe tiredness.
• Neurologic problems. Call your doctor if you have symptoms of neurological problems such as headache, jerking muscle movements, numbness and tingling, tremors, double vision, problems walking, or hearing loss.

Due to the risk of CRS and neurologic symptoms, you will need to stay in the hospital for 48 hours after all injections that are part of the “step-up dosing schedule.” For more information about the “Step-up dosing schedule”.

Before taking this medicine

To make sure this medicine is safe for you, tell your doctor if you currently have an infection.

Pregnancy

You may need to have a negative pregnancy test before starting this treatment.

May harm an unborn baby. Use effective birth control while using teclistamab and for at least 5 months after your last dose. Tell your doctor if you become pregnant.

Breastfeeding

Do not breastfeed while using this medicine, and for at least 5 months after your last dose.

How will I receive this medicine?

Follow all the directions on your instruction sheets.  Read the Patient Wallet Card about serious side effects and learn what symptoms to watch for. Keep the card with you at all times.

Tecvayli is given by a HCP (healthcare professional) as an injection under the skin (subcutaneous injection) in the stomach area, thigh, or another area.

Tecvayli Dosing Information

Initial Tecvayli dosage

Tecvayli is given initially as Step-up doses.

• This means the first dose is the lowest dose and is called Step-up dose 1. It is given on day 1.
• The second dose is slightly higher and is called Step-up dose 2. It is usually given on day 4.

The next dose is the first treatment dose which is higher than step-up dose 1 and step-up dose 2. The first treatment dose is usually on day 7 and is usually weekly after that.

You will need to stay in the hospital for 48 hours after Step-up dose 1, Step-up dose 2, and your first treatment dose. Talk with your doctor if you have any questions.

You may be given other medications to help prevent serious side effects. Keep taking these medicines for as long as your doctor has prescribed.

Your treatment with this medicine may be temporarily or completely discontinued if you have certain side effects.

You will need medical tests before and during treatment with this medicine.

Maintenance Tecvayli dosage

Patients who have achieved and maintained a complete response or better for a minimum of 6 months may be transferred to every two weeks (biweekly) dosing schedule.

Table Adult Tecvayli Dose for Multiple Myeloma

General dosing information

• Patients should be hospitalized for 48 hours after administration of all doses within the step-up dosing schedule.
• Step-up dose 2 may be given between 2 to 4 days after step-up dose 1 and may be given up to 7 days after step-up dose 1 to allow for resolution of adverse reactions.
• The first treatment dose may be given between 2 to 4 days after step-up dose 2 and may be given up to 7 days after step-up dose 2 to allow for resolution of adverse reactions.
• Administer pretreatment medications 1 to 3 hours before each dose of the step-up dosing schedule, which includes step-up dose 1, step-up dose 2, and the first treatment dose to reduce the risk of CRS: corticosteroid (oral or intravenous dexamethasone 16 mg), histamine-1 (H1) receptor antagonist (oral or intravenous diphenhydramine 50 mg or equivalent), and antipyretics (oral or intravenous acetaminophen 650 mg to 1,000 mg or equivalent). 

Tecvayli is available as:

• 30 mg/3 mL (10 mg/mL) single-dose vial. NDC: 57894-449-01 (10 digit) or 57894-0449-01  (11 digit)
• 153 mg/1.7 mL (90 mg/mL) single-dose vial. NDC: 57894-450-01 (10 digit) or 57894-0450-01 (11 digit)

Tecvayli J code

Tecvayli J-code is J9380 (teclistamab-cqyv, 0.5 mg)
J codes are used for medicines that are not taken orally and include injections, inhalations chemotherapies. J codes are important accurate and consistent coding for billing and reimbursement purposes.

Your physician will need Tecvayli J-code when filling out forms for your treatment.

ICD-10-CM Diagnosis Codes

Diagnosis codes are used on both inpatient and outpatient claims.
ICD-10-CM Diagnosis Codes used for multiple myeloma include:

• C90.00 Multiple myeloma not having achieved remission 
• C90.02 Multiple myeloma in relapse

What happens if I miss a dose?

Call your doctor for instructions if you miss an appointment for your injection.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while receiving this medicine?

Avoid driving or hazardous activity for 48 hours after receiving certain doses of this medicine or until neurological symptoms go away. Your reactions could be impaired.

What other drugs will affect this medicine?

Tell your HCP (healthcare professional) about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. See the link below to check for interactions with this medicine.

Tecvayli Package Insert 

HCPs and patients often use the Tecvayli Package Insert (PI) for more detailed information about this medicine. The Tecvayli Package Insert contains more comprehensive information on Indications and Usage, Dosage and Administration, Clinical Pharmacology, Clinical Studies, Drug Interaction, and more. Discuss any medical questions you have with your HCP (health care professional). This is not all the information you need to know about this medicine for safe and effective use, and it does not take the place of talking to your doctor about your treatment.

The Package Insert is sometimes called Tecvayli Prescribing Information (PI) or FDA label.

Storage

• Store refrigerated at 2°C to 8°C (36°F to 46°F.
• This medicine should be stored in the original carton to protect it from light.
• Do not freeze.

Ingredients

Active ingredient: teclistamab-cqyv

Inactive ingredients: edetate disodium, glacial acetic acid, polysorbate 20, sodium acetate, sucrose, Water for Injection

Manufacturer

Tecvayli manufacturer Janssen Biotech, Inc., Horsham, PA 19044, USA

Tecvayli Biosimilars

Biosimilar and interchangeable products are biological products that are highly similar to and have no clinically meaningful differences from the reference product.

Reference products

These are biological products that have already been approved by the FDA, against which biosimilar products are compared. There is 1 for Tecvayli.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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