If you'd like more detailed information on Promensil, please contact Natrol, Inc.

Natrol, Inc.
21411 Prairie Street
Chatsworth, CA 91311

Tel: 1-800-326-1520

For Promensil information call 1-888-749-8860

Customer support hours of operation:
Weekdays between 9 am - 7 pm EST.

Email addresses (click appropriate option):-
customer-service@natrol.com