There are several injectable therapies designed to help treat MS. While these MS treatments are all given by injection, they are not the same types of injections.
Subcutaneous Injection
Subcutaneous, or under-the-skin injections, use a needle to deliver medications into tissue just under the skin. A common side effect associated with subcutaneous injections is injection-site reaction such as swelling, redness, and pain.
Intramuscular (IM) Injection
An IM injection is given directly into the muscle tissue of the body, such as the thigh or upper arm. People taking IM injections report few injection-site reactions.
A common myth about IM injections is that they will be more painful because they require a longer needle. However, the pain of injections mostly comes from piercing the top layers of your skin, where pain receptors are located. So your level of pain should be similar whether the injection is under the skin or into the muscle.
More about infusion treatment
It is important to remember that all medications have side effects and risks. Prior to starting any MS therapy, you should talk to your doctor to decide if it is right for you.