A family member (70 yr old female) recently started taking B-12 5mg methylcobalamin tablets in an effort to increase their B-12 levels. Before starting to take the B-12 tablets they had symptoms that included the following:

1. Daily fatigue
2. Light-headed when standing up
3. Forgetfulness/Memory issues (mixing up names, forgetting directions, etc)
4. Low appetite
5. Always feeling cold

It has now been 3 weeks since she started taking the daily 5mg tablet and during that 3 weeks some of her symptoms have seem to worsen.

1. Her daily fatigue has gotten worse
2. Her memory seems to have gotten worse (forgetting family members' names, not remembering things that happened a day or two ago, thinking that family members who are dead are still alive, etc)

When starting B-12 treatment does symptoms tend to get worse before they get better or is something else causing this?