The valgus of the knee is also known as the valgus collapse and medial displacement of the knee. It is characterized by an adduction and internal rotation of the hip, usually when it is in a hip-flexed position (the knee actually abducts and rotates externally). It can also be thought of as a knee that expires while you descend on a<u> squat </u>or landing. When standing on one limb, the pelvis on the opposite side usually also falls during the valgus collapse.
Inadequate gluteus / hip strength (lower gluteus, gluteus buttocks, gluteus maximus, external hip rotators), possibly in combination with<u> hyperactive hip adductors</u>, prevents adequate stabilization of the femur. The hips move in adduction and internal rotation. And when the adductors are hyperactive compared to the external buttocks / rotators of the hip, the knee is dragged in a manner similar to the collapse of the valgus.
To do a adequate assessment and medical history to see if she would qualify for the medication. You cant just Rx a med because it worked for her friend.
For example, people who have anorexia severely reduce their food intake to lose weight. People who have bulimia eat an excessive amount of food in a short period of time, then purge or use other methods to prevent weight gain.