Code for a procedure on the femur

Which of the following is NOT a common reason for therapeutic substitution?

The prescribed medication is unavailable The prescribed medication is less convenient to use The prescribed medication is inexpensive The third-party payer does not cover the prescribed medication

Dysmenorrhea is caused by a lack of blood flow to the pelvic organs or by a possible hormonal imbalance.

Answer the following statement true (T) or false (F)