Does taking adderall (dextroamphetamine and racemic amphetamine) xr 20mg cause urine to be cloudy and slightly darker than normal? i don't have a fever or pain when urinating. i don't feel sick.

It can do that: While it is good that you don't feel sick or have pain - it's still a serious enough side effect to have warnings to call your doctor immediately if it occurs. So, call your doctor ASAP. Don't worry, but call. Also, I believe it is okay to skip doses so you can not take it until the doctor discovers the cause of your urine appearance and rules out Adderall (dextroamphetamine and racemic amphetamine) as the culprit. Take care!