After getting a vitamin B12 injection some people may experience a disturbance to the nervous system. These symptoms may include dizziness, difficulty walking normally, nervousness, anxiety, weakness and uncoordinated movements.
B12 supplements are usually safe. For adults, doctors recommend 2.4 micrograms a day. If you take more than what you need, your body passes the rest out through your pee. Still, high doses could have some side effects, like dizziness, headache, anxiety, nausea, and vomiting.
Thus if you're otherwise healthy but still continue to feel tired after taking a B-12 supplement, it could be a sign of a mild allergic reaction. If a rash, difficulty breathing or swelling coincides with taking your dose of B-12, get to the doctor right away.
Fatigue. Megaloblastic anemia due to vitamin B-12 deficiency may lead to a person feeling fatigued. Without enough red blood cells to carry oxygen around their body, a person can feel extremely tired.
The sudden increase in B12 can cause nausea, dizziness and headaches when first injected into the muscle. The human body is usually quick to adjust, though, so these symptoms should fade soon afterward. In rare cases, B12 can affect your potassium levels, causing muscle cramps or spasms.
It may take a few weeks before your vitamin B12 levels and symptoms (such as extreme tiredness or lack of energy) start to improve. If you have hydroxocobalamin injections to boost your vitamin B12 levels at the start of treatment, the cyanocobalamin tablets may start to work within a few days.
Generally, the results of vitamin B12 injections can last about one week, but it is vital to have this administered by a healthcare provider. Also, the healthcare provider will determine the appropriate B12 dosage, depending on the current medical condition and diet.
Vitamin B12 deficiency can have distressing neuropsychiatric symptoms. It can have an etiological role in clinical presentations like depression, anxiety, psychosis, dementia, and delirium, requiring screening of at-risk populations.
You may be aware that during the Covid pandemic we have stopped giving vitamin B12 injections to minimise footfall into the Surgery.
Another benefit of a vitamin B12 shot is that there isn't a “crash” associated with it either. The way we like to describe it to people is that you will feel focused and energized for 3-5 days with the benefit of being able to sleep (won't keep you up at night) and no crash as your body metabolizes the vitamin.
B12 injections work quickly. They are one of the most effective ways for your body to assimilate vitamin B12. Within 48 to 72 hrs, your body will begin making new red blood cells. For deficiencies, you may require a number of injections over a few weeks to see peak impact.
Stage 1 is decreased levels of vitamin B12 in the blood. Stage 2 is low concentration of vitamin B12 in the cell and metabolic abnormalities. Stage 3 is increased levels of homocysteine and MMA and decreased DNA synthesis resulting in neuropsychiatric symptoms. Stage 4 is macrocytic anemia.
Vitamin B deficiency can cause diseases such as beriberi, pellagra or anaemia. People who are vitamin B deficient may feel tired, numbness or weak, among other symptoms.
Pain/redness at the injection site, mild diarrhea, itching, or a feeling of swelling all over the body may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
Vitamin B-12 is added to some foods and is available as a dietary supplement. Health care providers commonly prescribe vitamin B-12 shots to help prevent or treat pernicious anemia and B-12 deficiency.
Your liver stores B12 for a long time. It can take 3-5 years to use it up. You may get a shot once a week for a month. But you might need them more often if you have more serious symptoms, like nerve problems, or your pernicious anemia is serious.
If your vitamin B12 deficiency is not caused by a lack of vitamin B12 in your diet, you'll usually need to have an injection of hydroxocobalamin every 2 to 3 months for the rest of your life.
A lack of vitamin B12 can cause neurological problems, which affect your nervous system, such as: vision problems. memory loss. pins and needles.
Several studies have shown that people experiencing anxiety have lower vitamin B12 levels. One 2000 study found that men with vitamin B12 deficiency who recently lost a loved one reported higher levels of anxiety and depression (2).
Some of the negative side effects of vitamin B overdose include mood swings, restlessness, depression, and panic attacks. Mood swings can worsen in people who suffer from paranoia, confusion, or mental fogginess; due to the high doses of vitamin B complex.