Intramuscular vs Subcutaneous injections what's the difference? At KDR, we often use peptides and wellness injections like NAD, glutathione, and HCG, but they are not all administered the same way. Intramuscular injections ( IM Injections Revive at The Group Med Spa Glutathione Strive Pharmacy Glutathione IM The Center Medical What to Expect Before and After a Glutathione Injection Treatment Cosmetic Clinic