"Pernicious" means "harmful" or "destructive." This type of B12 deficiency anemia can affect many body systems and cause problems in your gut, heart, and muscles
Weeks 1 to 4 (introductory phase) use a 1 to 2 percent concentration once daily in the evening, which lets the skin acclimate while the physician assesses tolerance
Front Psychiatry (2019) 10:30
Second, these windows represent maximum allowed time, not optimal time
It requires sterile technique, causes discomfort for needle-averse individuals, creates potential injection site reactions, and demands careful rotation to avoid tissue damage over extended protocols
Individualized Protocol: Your provider may adjust your schedule based on your response, lab results, and treatment goals