Since it's an uncommon item that seems pretty important to doing this safely, could you let us know a reliable place (for non-biochemists) to source SLSV025LS filters?
I got mine from
Fisher Scientific; I believe they accept personal orders.
I did some further research on filters a while back, and it appears that Millipore's
SLGV033RS filter would also be acceptable, as it is a 0.22µm, sterile, non-pyrogenic, low-protein binding, hydrophilic PVDF filter. The smaller pore size would have the advantage of potentially filtering out some bacteria/contaminants for added safety; 5µm is too large to catch most bacteria. Note that the user guide for this filter recommends using a 10cc or larger syringe due to pressure ratings.
As a reminder, Trevyn posted a ref in #183 showing that 10cc is acceptable. Though if, as animal suggests, it may lead to problems if the same site is soon re-used, splitting it between two sites might ameliorate potential damage?
I do tend to alternate between left and right leg, and try to move the actual injection point around some.
Also, since there was some discussion on it, I've ordered several times from drugs-pro, and their customer service and shipping has been reliable. Unfortunately, I'm not in a position to comment authoritatively about the authenticity of their (or anyone else's) product, which is why I've been hesitant to talk suppliers. I did enjoy hearing about the Internationale Apotheke in Austria -- it's not currently a high priority for me, but I suspect that I may be able to procure a legitimate prescription that I could send to them. If I do this eventually, I will absolutely report back about it.