Simplify the following text for a Grade 13 native English-speaking person.
Original: Blue mass , a pill or syrup in which mercury is the main ingredient , was prescribed throughout the 19th century for numerous conditions including constipation , depression , child-bearing and toothaches .
Simplified: Blue mass , a pill or syrup in which mercury is the main ingredient , was prescribed throughout the 1800s for different conditions such as constipation , depression , child-bearing and toothaches .