Why do i feel hot and then cold or hot and then cold lately. im not sick. i haven't taken vyvanse (lisdexamfetamine) in 3 days. ?

Withrawal of V.: This medication may cause withdrawal reactions, especially if it has been used regularly for a long time or in high doses. In such cases, withdrawal symptoms (such as severe tiredness, sleep problems, mental/mood changes like depression) may occur if you suddenly stop using this medication. Hot spell -fever like syymptom may occur. Addictive- seek beavior may sometimes occur. T.