This study aims to evaluate the adherence of patients to combined treatment with bisphosphonates and calcium and vitamin D supplements, which is one of the usual treatments for postmenopausal osteoporosis. The study will consist of a single visit that will coincide with one of the patient's usual follow-up visits according to standard clinical practice. During this visit, information will be collected from the patient's medical history and an interview will be conducted using 3 questionnaires to assess how and how often the patient takes the treatment, possible forgetfulness, and whether or not the patient is satisfied with their current treatment.

Inclusion Criteria:

1. - Women diagnosed with postmenopausal OP.
2. - Women who had been prescribed oral treatment with a BP administered monthly or weekly together with a Ca/D supplement (sachets or chewable tablets) administered daily, at least 6 months prior to inclusion in the study.
3. - Women who had given their written informed consent before participating in the study.

Exclusion Criteria:

None

Women with postmenopausal osteoporosis who have been prescribed treatment with an oral bisphosphonate combined with Ca/D supplements.