The most common side effects are mild and include injection site reactions (redness, slight swelling, or tenderness), mild headaches during the initial days of use, and occasional dizziness or lightheadedness
Confirmatory diagnostic studies should be performed prior to initiating therapy, if possible, and the patient should be followed with appropriate studies to demonstrate hematologic improvement (Hgb, hematocrit, RBC, reticulocyte count)
But injections bypass all that
Some clinicians consider this route when targeting localized tissue concerns
Athletes subject to drug testing cannot use these products regardless of the format
Additionally you may have difficulty walking, memory loss, or even numbness and tingling