# rebif my 2nd week **URL:** \ **Category:** Everyday living\ **Created:** [16 August 2013 18:44 UTC](https://forum.mssociety.org.uk/t/rebif-my-2nd-week/18114 "2013-08-16T18:44:59Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Inactive\_User](https://avatars.discourse-cdn.com/v4/letter/i/3e96dc/32.png) [@Inactive\_User](https://forum.mssociety.org.uk/u/Inactive_User)\ **Post date:** [16 August 2013 18:44 UTC](https://forum.mssociety.org.uk/t/rebif-my-2nd-week/18114/1 "2013-08-16T18:44:59Z")
Hi everyone, Although this is my first post I have been visiting this this over thw last 2 years since i was diagnosed… So I started on rebif with the rebismart a little over 2 weeks ago, and have just done my 2nd 22mg dose. So far through this titration period no side effects 🙂 I hope it stays this way!! What I am actually trying to find out is how long the first titration cartridge is supposed to last, I have done the 2 weeks of 8.8mg and now 2 doses of 22mg and according to my device it will let me do another dose out of the first cartridge does this sound right. I didnt think it would last this long??? Thank you 😉 Xx ---
**Author:** ![Bambi19](https://avatars.discourse-cdn.com/v4/letter/b/c89c15/32.png) [@Bambi19](https://forum.mssociety.org.uk/u/Bambi19)\ **Post date:** [17 August 2013 17:20 UTC](https://forum.mssociety.org.uk/t/rebif-my-2nd-week/18114/2 "2013-08-17T17:20:37Z")
Unfortunatley I cant answer your question as I’m SP and on no DMD’s ☹ but thought I’d reply just to bump you up the board in a hope that someone will give you the answer your looking for. Oh and welcome by the way Sue x ---
**Author:** ![Inactive\_User](https://avatars.discourse-cdn.com/v4/letter/i/3e96dc/32.png) [@Inactive\_User](https://forum.mssociety.org.uk/u/Inactive_User)\ **Post date:** [17 August 2013 17:53 UTC](https://forum.mssociety.org.uk/t/rebif-my-2nd-week/18114/3 "2013-08-17T17:53:18Z")
Hi I went straight on to 22mg and at the time used a different auto injector with pre-filled single use syringes but with a little maths I think I can answer your question. I now use the Rebismart and do 3 x 44mg injections per week out of a single cartridge. This means that a cartridge contains 3 x 44 = **132** mg. You have already completed 2 weeks of 3 injections at 8.8mg each and 2 doses of 22mg so:- 6 x 8.8 = **52.8** 2 x 22 = **44** Subtotal = **96.8** **132 - 96.8 = 35.2mg** (this is what is now left in your cartridge) Answer = yes, your cartridge will let you complete another injection out of the initial cartridge. Hope this helps. It’s great that you haven’t had any side effects, I doubt you will get any now as your body should be getting used to Rebif. It sounds as if you are coping really well. Tracey x ---
**Author:** ![Inactive\_User](https://avatars.discourse-cdn.com/v4/letter/i/3e96dc/32.png) [@Inactive\_User](https://forum.mssociety.org.uk/u/Inactive_User)\ **Post date:** [18 August 2013 15:30 UTC](https://forum.mssociety.org.uk/t/rebif-my-2nd-week/18114/4 "2013-08-18T15:30:17Z")
Hi jem1106, Glad to hear that you started rebif two weeks ago and is going well (and hope it continues to do so). I made a decision this Wednesday to start my 11 year old son on Rebif aswell and it was a positive to read your column I hope my son does’nt get any side affects aswell. Good luck and well done. ---
**Author:** ![Inactive\_User](https://avatars.discourse-cdn.com/v4/letter/i/3e96dc/32.png) [@Inactive\_User](https://forum.mssociety.org.uk/u/Inactive_User)\ **Post date:** [28 August 2013 18:28 UTC](https://forum.mssociety.org.uk/t/rebif-my-2nd-week/18114/5 "2013-08-28T18:28:08Z")
Thank you for your kind comments, Spursfan - I hope your son gets along with rebif ok, good luck 🙂 Xx