Vaccines & biologics

ProQuad®

Measles, Mumps, Rubella and Varicella (Oka/Merck) Virus Vaccine Live

This item ships directly from Merck. Orders placed after 12 PM Eastern will process the following business day. If you need to overnight your order for this product or have any shipping questions, contact customer support.

10 Single-dose Vials of Lyophilized Vaccine (0.5mL) and 10 Vials of Diluent 

This item may take up to 5 days to ship. 

4171-00 | Merck


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To maintain potency, ProQuad must be stored frozen between -58°F and +5°F (-50°C to -15°C). Use of dry ice may subject ProQuad to temperatures colder than -58°F (-50°C). Before reconstitution, store the lyophilized vaccine continuously in a reliably maintained freezer (e.g., chest, frost-free) for up to 18 months. ProQuad may be stored at refrigerator temperature (36° to 46°F, 2° to 8°C) for up to 72 hours prior to reconstitution. Discard any ProQuad vaccine stored at 36° to 46°F which is not used within 72 hours of removal from 5°F (-15°C) storage. Protect the vaccine from light at all times since such exposure may inactivate the vaccine viruses.

IF NOT USED IMMEDIATELY, THE RECONSTITUTED VACCINE MAY BE STORED AT ROOM TEMPERATURE, PROTECTED FROM LIGHT, FOR UP TO 30 MINUTES. DISCARD RECONSTITUTED VACCINE IF IT IS NOT USED WITHIN 30 MINUTES. DO NOT FREEZE RECONSTITUTED VACCINE. Diluent should be stored separately at room temperature (68° to 77°F, 20° to 25°C), or in a refrigerator (36° to 46°F, 2° to 8°C). For information regarding stability under conditions other than those recommended, call 1-800-MERCK-90.