From our health page on WWW resources, we have this posted - and I would highly recommend you step through the drug selection process on the MS UK site.
Medical treatments can be broken into two categories – the Disease Modifying Drugs (DMD’s) that are meant to alter the course of MS; and the treatment for symptoms - these are drugs and therapies that can be used to alleviate the every day symptoms of MS. Information on these drugs for symptoms can be found on the web and are perhaps too numerous to list here.
The MS Society of the UK has built an interactive guide that walks you through the process of deciding which DMD might be right for you, depending on many factors that it asks . I found this tool very helpful in understanding the differences in the drug treatments.
http://www.msdecisions.org.uk/
DMD’s – these are the company-sponsored MS support program websites for their respective drugs.
Avonex – www.avonex.com
Betaseron – www.mspathways.com
Copaxone – www.sharedsolutions.com
Rebif – www.mslifelines.com
Tysabri – www.tysabri.com
http://www.medhelp.org/health_pages/Multiple%20Sclerosis/MS-RESOURCES-ON-THE-WWW/show/493?cid=36
I was thinking about your question a few minutes ago and wonder - the injections are in the front of the thigh, and unless you wear mini-mini skirts or very short shorts, no one will see the injection site.
Good luck in coming to a decision.