I have worked as a holistic healing professional with a focus on the brain for many years and the feelings of sweating and chills happen to many people. They are not necessarily an anxiety attack. I myself felt them after trying a drug once and I know for a fact i was not anxious. The brain is an intricate mechanism and the energy lines(meridian lines in chinese medicine) run through it and to all areas of your body in intricate ways. If you are having this effect it may be the drug is hitting a part of your brain and tapping it into overdrive. I'd check with your doctor. If it feels like you want to try another drug - do it. Hold your power. Your doctor is human, they are not in your shoes and only you can determine if something is feeling right for you.Other alternative options you may want to look into are homeopathy, acupuncture, integrative release therapy, energy work, NLP and meridian therapy. I am not saying to do them alone, I am saying I've found combinations of therapy very helpful for my clients and these are a few of the therapies my clients have found useful with the symptoms listed.Best of luck. Healing light.