Simply click the Register link at the top of any MSD webpage and follow the prompts.
Note: You will be registered automatically within minutes, but online ordering ability is not automatic. MSD must enable your account for online ordering before you place your first online order. A member of our customer service team must associate you with a known customer. The process can take up to one business day. We do this to protect our customers and to ensure that you see accurate information and pricing related to your account.