Multivitamins are not known to play any role in (assuming a diagnosis of) Androgenetic Alopecia.
You can safely stop them. But if cost is an issue and you want to continue, you can switch to cheaper options from other manufacturers.
Next Steps
Consult a General Physician / Dermatologist
Health Tips
Minoxidil lotion should be applied twice daily for maximum benefit. Minoxidil treatment for Androgenetic Alopecia is lifelong.