I explained to my GP that the cheaper ones would only be used once... and I do actually multi use injection needles and it wasn't actually a saving using 6-8 needles a day compared to two (one on each pen) for a fortnight!! (Yes, I do know I shouldn't!!-always done thisexcept when on pump-I use them till I feel they are blunt).
Also ask them how they would feel about using rough edged needles in them for 60,000 times... The cheaper ones are rough edged compared to the BD needles.....even my DSN at hospital was insistent that I only had BD ones because of the qty of times we will have to inject in our life time!!
Everybody that has problems with the cheaper needles need to report them on the MHRA website - its the only way to stop NICE recommending theyare the preferred choice for us!!