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Benlysta Dosage

Generic name: BELIMUMAB 400mg in 5mL
Dosage form: injection, powder, lyophilized, for solution

The information at is not a substitute for medical advice. Always consult your doctor or pharmacist.

Dosage Schedule

BENLYSTA is for intravenous infusion only and must be reconstituted and diluted prior to administration [see Dosage and Administration (2.3)]. Do not administer as an intravenous push or bolus.

The recommended dosage regimen is 10 mg/kg at 2-week intervals for the first 3 doses and at 4-week intervals thereafter. Reconstitute, dilute, and administer as an intravenous infusion only, over a period of 1 hour. The infusion rate may be slowed or interrupted if the patient develops an infusion reaction. The infusion must be discontinued immediately if the patient experiences a serious hypersensitivity reaction [see Contraindications (4), Warnings and Precautions (5.4)].

Premedication Recommendations

Prior to dosing with BENLYSTA, consider administering premedication for prophylaxis against infusion reactions and hypersensitivity reactions [see Warnings and Precautions (5.4, 5.5), Adverse Reactions (6.1)].

Preparation of Solutions

BENLYSTA is provided as a lyophilized powder in a single-dose vial for intravenous infusion only and should be reconstituted and diluted by a healthcare professional using aseptic technique as follows. Use of a 21- to 25-gauge needle is recommended when piercing the vial stopper for reconstitution and dilution.

Reconstitution Instructions

1. Remove BENLYSTA from the refrigerator and allow to stand 10 to 15 minutes for the vial to reach room temperature.

2. Reconstitute the BENLYSTA powder with Sterile Water for Injection, USP, as follows. The reconstituted solution will contain a concentration of 80 mg/mL belimumab.

Reconstitute the 120-mg vial with 1.5 mL Sterile Water for Injection, USP.
Reconstitute the 400-mg vial with 4.8 mL Sterile Water for Injection, USP.

3. The stream of sterile water should be directed toward the side of the vial to minimize foaming. Gently swirl the vial for 60 seconds. Allow the vial to sit at room temperature during reconstitution, gently swirling the vial for 60 seconds every 5 minutes until the powder is dissolved. Do not shake. Reconstitution is typically complete within 10 to 15 minutes after the sterile water has been added, but it may take up to 30 minutes. Protect the reconstituted solution from sunlight.

4. If a mechanical reconstitution device (swirler) is used to reconstitute BENLYSTA, it should not exceed 500 rpm and the vial swirled for no longer than 30 minutes.

5. Once reconstitution is complete, the solution should be opalescent and colorless to pale yellow, and without particles. Small air bubbles, however, are expected and acceptable.

Dilution Instructions

6. Dextrose intravenous solutions are incompatible with BENLYSTA. BENLYSTA should only be diluted in 0.9% Sodium Chloride Injection, USP (normal saline), 0.45% Sodium Chloride Injection, USP (half-normal saline), or Lactated Ringer’s Injection, USP to a volume of 250 mL for intravenous infusion. From a 250‑mL infusion bag or bottle of normal saline, half-normal saline, or Lactated Ringer’s Injection, withdraw and discard a volume equal to the volume of the reconstituted solution of BENLYSTA required for the patient’s dose. Then add the required volume of the reconstituted solution of BENLYSTA into the infusion bag or bottle. Gently invert the bag or bottle to mix the solution. Any unused solution in the vials must be discarded.

7. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. Discard the solution if any particulate matter or discoloration is observed.

8. The reconstituted solution of BENLYSTA, if not used immediately, should be stored protected from direct sunlight and refrigerated at 2° to 8°C (36° to 46°F). Solutions of BENLYSTA diluted in normal saline, half-normal saline, or Lactated Ringer’s Injection may be stored at 2° to 8°C (36° to 46°F) or room temperature. The total time from reconstitution of BENLYSTA to completion of infusion should not exceed 8 hours.

9. No incompatibilities between BENLYSTA and polyvinylchloride or polyolefin bags have been observed.

Administration Instructions

1. The diluted solution of BENLYSTA should be administered by intravenous infusion only, over a period of 1 hour.

2. BENLYSTA should be administered by healthcare providers prepared to manage anaphylaxis [see Warnings and Precautions (5.4)].

3. BENLYSTA should not be infused concomitantly in the same intravenous line with other agents. No physical or biochemical compatibility studies have been conducted to evaluate the coadministration of BENLYSTA with other agents.