Am I a very anxious person? I took inderal, and just feel perfect. My perfomance increased a lot. For example, I never finish a math test before the additional time, and the first time I took inderal, I finished 30 minutes before. The test is for 90 minutes plus 15 minutes. But got the a similar mark: 196/200. The day after I got a biology test for the same amount of time. I finished this test in 20 minutes and got 200/200, and I always take 80/100 minutes to finish a biology test. Why did I get such a different perfomance?