Additional tests may include full blood count (looking for macrocytic anaemia), methylmalonic acid, and homocysteine levels
10.1038/nrdp.2017.40 [DOI] [PubMed] [Google Scholar] Higgins J., Green S
Sideeffects are mild and transientdrowsiness, brief headache, vivid dreams, or occasional injectionsite irritationwithout tolerance or dependence Potential side effects include injection site irritation, headache, vivid dreams, and hormonerelated effects
215 The risk of testicular cancer in men with infertility is about 0.5%, which, though low, is 100-fold higher than in the overall male population
Taking more than the advanced dose rarely leads to faster or better results and significantly increases the risk of side effects (e.g., water retention, numbness, nausea)