Your first dose of Avastin will be given as over 90 minutes. If you tolerate the 90 minute infusion well, infusions in the future may be given over a shorter period of time. However, if you do not tolerate the shorter infusion time, future infusions will be given over the longer period that you previously tolerated. If you experience any problems during or following the infusion, you will be monitored by trained staff until it is considered safe for you to leave.