Originally Posted by the Cardinal
Yep, both ephedrine and yohimbine have the potential to cause anxiety and insomnia. Ephedrine can also cause temporary loss of libido and prostate enlargement (primary symptoms: limp [and sometimes] constricted penis, constantly contracted scrotum, weak urine stream, and frequent urination from the bladder not completely emptying due to enlarged prostate and from the constricted weenie). The symptoms should reverse themselves when you stop using the products. You may also want to consider not using ephedrine with yohimbine, which may lessen some of the symptoms you are describing.
My advice, for whatever it's worth, is to discontinue using the particular combination of products for the time being, then maybe try an e/c/ or y/c stack (depending on what you are trying to accomplish).