What is the independent variable, dependent variable and type of study?

A pharmacologist is testing whether a new anti-anxiety medication, Moodcor, will cause people to gain weight. To test this, she gives 100 people moodcor for one month and 100 people a placebo drug (sugar pill). At the end of the month, she monitors any weight gain.What is the independent variable, dependent variable and type of study?
Independent Variable: The type of medication/pill.

Dependant Variable: Weight change.

Type of Study: No idea.

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