I asked my dr to try propranolol to help with physical symptoms of anxiety, I've been taking 3 x 40mg for 4-5 days now but it doesn't seem to be effective and I'm noticing unpleasant side effects such as dizziness, fatigue, numb hands and problems waking up multiple times during sleep. How long does a physical dependence take to form on this medication? Can I discontinue use without tapering at this stage?