Hello,
Welcome to the forum. It is true that loss of libido and difficulty having an orgasm are common side effects
of the drug Adderall but as far as from your post, i can understand that you have taken it only once and that
too 1 month back. Hence it is unlikely to be the side effect for persisting for 1 month if you are not taking
it regularly. Other causes need to be probed. These include psychological causes, Factors such as pressure,
angle and grip during masturbation and intercourse, neurological and endocrine diseases (diabetes), prostate
problems, some allergies, infections like balanoposthitis, obstruction in the urethra and high blood pressure.
I suggest you to consult a urologist and get investigated for these possibilities if the symptoms are severe.
I hope it helps. Take care and please do keep us posted in case you have any additional doubts. Kind regards.