Hi. Dr. please , previously before two month the Dr. of urology exam my prostate and said ( not bad ), after that he describe ( oxybutynin 5 mg.), after i take it i suffer from dry mouth worse , then he describe me (DARIFENACIN ER 15 mg. ), this drug make me addition to dry mouth & throat, also constipation worse and stop it ? . then now he describe me (MYRBETRIQ ER 25 MG. ) ? , but this drug not cover by HORIZON INSURANCE) and wait till now the oroval of insurance?, what can I do now?, then I can take ( saw palmetto) , and which concentrate ?, and THANK YOU ...