The validity of the hold harmless agreement depends from state to state. Some states have anti-indemnity laws that will prohibit these agreements while some states are broad in terms of the language. It may be possible to change your work assignments or temporarily arrange for less hazardous work. You probably shouldn't do tasks that require the use of a respirator, or that are highly physically demanding. This is where you will find the information you need about dosage and side effects. If you can't read – or don't fully understand – the label, ask a pharmacist. Find one that works best and gives you the least troublesome side effects, and stay with it.