These medications may also be used to treat thyroid cancer or other thyroid conditions. The long-term safety of levothyroxine is well established. Typically side effects only occur due to overdosage of the medication. For more specific information, consult with your doctor or pharmacist for guidance based on your specific condition and current medications.
My neighbor just puts 3-4 gal of bleach down the pipe, then waits 24 hrs. Then runs water through all the fixtures until the bleach smell is gone. He said it usually last for 1-1/2 years. Our water is relatively soft, but does have a bit of iron in it.
Recirculate water. Continue to recirculate for about 30 minutes after you first smell bleach from the garden hose. Use chlorine test papers as a visual indicator to determine if the water from the hose is at least 50 ppm of bleach. If below 50 ppm, go to STEP 5 and add more bleach solution and repeat STEPS 6 and 7.