A dog had bitten one of my students. To be on safe side ARV was initiated along with TT. The doctor who was giving the injection, just put the sterile water (from the ampoule) into the vial containing the powder and drew the vaccine without shaking the vial. Now, I had seen many doctors, nurses or compounders shaking the vial a bit before, so it dissolves to get a clear solution. The Doctor said the powder just dissolves itself while coming in contact with the water and no need to shake the vial. Is it safe to administer the ARV this way?