| You can reuse pen needles.
The one thing that can happen with pen needles is that the pen will leak a bit if you leave the needle on between uses. So I take the needle off between uses, but reuse the same needle.
Dr. Bernstein discussed this topic in his most recent teleconference and said that reusing pen needles was fine. Just change them if they start to feel dull. Also, don't forget to do the air shot each time before you inject. VERY important. If the pen needle is at all bent, change it.
With the Solostar, my doctor gave me one as a sample, but I use such small doses I like to use fractions, so I extract the Lantus with a syringe.
I reuse the syringe, but do NOT inject air into the pen (or vial). | 
