How long after PRP injections are platelets active or attaching, such that you have to avoid blood thinners? For example, if you get an ozone treatment you often get about 1000 units of heparin, that is active for about 3-4 hours in the system. Should you wait a week, or more or less, to avoid anything with any kind of blood thinning effect after PRP injections so that the platelets can work correctly?