4. You are on strong medication that may affect your reaction time. This is important on several levels. First, if you commute to work by car then you need to be careful when taking medication that may make you drowsy or slow to react. If the pill bottle warns that you shouldn’t drive or operate heavy machinery, don’t assume that it’s a useless suggestion and heed the warning. Second, if your job requires you to be sharp and react quickly then you should stay home when taking heavy medication that affects your perception or judgment.