Are glass syringes safe for iv use? If so are there any you could recommend. Also would you have to buy new needles regularly or are there ones available that don't get dull/can be sharpened?

I'm pretty sure the majority are made to last a fair while without getting dull.

High strength steel and such, i wonder if someones selling diamond tipped syringes?

bluetips, the euro syringe's, come with replaceable needle tips, and barrels. the only downside is the gauge's are in millimeters..

I'm pretty sure the glass ones allow for replacement of the needle. Clean that thing religiously with bleach and rinse with hot water for a while. Also the inside of the needle if you're planning on reusing that, but a dull needle can cause more bruising and pain. If it were my veins I'd stick with clean fresh new disposable syringes.

okay but most places ive seen online say that the glass ones are for industrial and veterinary use only, why is this?