Ok Long ? I Took A 75 Strength Fententyl Patch

Ok long ? I took a 75 strength fententyl patch for 3 years until I developed a tolerance for the drug-for severe back pain-so they put me on a low dose of methadone worked well for 9 months but my hair got really greasy and started to fall out. Then they put me on oxycodone Hcl 15 mg 1 pill four times a day. This drug also has worked v well BUT my hair is still getting greasy and falling out! Eight years ago I was taking OxyContin at 2 40 strength pills one in the morning one late afternoon for over 3 years all was fine No grease NO hair loss but pain doc forced patients off OxyContin so V depressed as hair keeps falling out! .???