Mabthera Storage and Administration Timing
Mabthera (rituximab) should be allowed to reach room temperature for 30 to 60 minutes before administration to reduce injection pain and minimize the risk of lipodystrophy. 1
Pre-Administration Preparation
Allow the vial to warm at room temperature (15-30°C or 59-86°F) for 30-60 minutes before injection, keeping it away from direct sunlight. 1 This warming period is particularly important for patient comfort and tissue safety, as cold injections can cause local reactions and tissue damage.
Storage Requirements
Refrigerated Storage
- Store unopened vials at 2-8°C (36-46°F) in a refrigerator without freezing. 1
- Verify that your refrigerator maintains this temperature range consistently. 1
- Never freeze Mabthera, as freezing can alter the molecular structure and potentially reduce efficacy. 1
Pre-Administration Checks
- Always verify the medication is not expired before administration. 1
- Inspect visually for any changes in appearance, including clumping, frosting, precipitation, or changes in clarity or color. 1
- Avoid exposing the medication to direct heat, light, or excessive agitation during the warming period. 1
Transportation Considerations
When transporting Mabthera in hot or cold weather conditions, use insulated bags or cooler packs to maintain the 2-8°C temperature range. 1 Minimize time outside refrigeration during transport to preserve drug stability. 1
Common Pitfalls to Avoid
- Do not attempt to warm the medication using artificial heat sources (heating pads, microwaves, hot water) as this can damage the protein structure of the monoclonal antibody. 1
- Do not administer directly from the refrigerator without the 30-60 minute warming period, as this increases injection site reactions. 1
- Do not refreeze medication that has been stored at refrigerated temperatures. 1
Clinical Context
While the provided evidence focuses on infusion-related reactions with rituximab (showing IRs occur in the majority of patients during first infusion), 2 the specific guidance on room temperature equilibration addresses subcutaneous or intramuscular administration scenarios where cold medication can cause significant local discomfort and tissue reactions. 1