He later sold his company to the predecessor of Warner -- Lambert , which was purchased in 2000 by Pfizer .
Sloan 's liniment , with capsicum as a key ingredient , was also marketed for human use .
Sloan later sold Sloan 's company to the predecessor of Warner -- Lambert , which was purchased in 2000 by Pfizer .
Sloan 's liniment , with capsicum as a key ingredient , was also marketed for human use .