The table also lists redness at 10 to 20 percent, bruising at 5 to 12 percent, and nodules at 2 to 5 percent
Potential Side Effects While Vitamin B12 injections are generally safe, some people may experience mild side effects, including: Pain or redness at the injection site Mild diarrhea Itching or rash Headache Dizziness Severe allergic reactions are rare but require immediate medical attention
However, these increases were time dependent, and the levels returned to normal after about 1 month
A large trial reported in 1994 (pdf) that daily megadoses of the antioxidant beta-carotene increased the risk of lung cancer in male smokers by 18 percent and a 1996 trial was stopped early after researchers discovered that high-dose beta-carotene and retinol, another form of vitamin A, increased lung cancer risk by 28 percent in smokers and workers exposed to asbestos
Bradyarrhythmia can be physiologic, without symptoms or hemodynamic change
Fang, L., Crespo-Otero, R., Jones, C