Are there available medicines that could dissolve fibroids?

Not exactly: Fibroids are smooth muscle tumors usually of the uterus. While there are no medicines that "dissolve" the fibroids, gnrh agonists such as Lupron (leuprolide) will cause them to shrink in premenopausal women because the medicine blocks estrogen production which is needed for them to grow. Also uterine artery embolizaton will usually cause shrinkage. Finally, MRI guided focused ultrasound can help remove them.