I purchased Sust 250 and they are the Karachi Bin # is 310674 Exp 09/2010. This is my second injection. I am injecting 500ml once per week. I feel flu like symtoms and I am not sure if this normal. the symtoms seem to go away after a day or so. Is this normal. Please help.....I am a newbie at this.....Thanks ps will get pics soon.