Instead, most people may only experience chronic fatigue or frequent headaches from B12 deficiency
Injection techniques such as intramuscular injection require special care to avoid side effects, including potential nerve damage. Very rare but serious reactionssuch as severe allergy, difficulty breathing, chest pain, or signs of infection at the injection siterequire immediate medical attention
It treats acute and chronic metabolic disorders, debility after birth, malnutrition, growth block, inappetence, stress, frailty, catalepsy caused by anemia, and improves immunity and strength in racing or working animals
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[1] Other rare side effects noted (mostly in older literature or high-dose use) include: polycythemia vera and peripheral vascular thrombosis in patients receiving repeated injections (though these associations are not well understood, they were listed in prior product literature as possible adverse events)
Additionally, results of experiments performed on normal volunteers in whom intraepidermal nerve fibers were denervated by the application of capsaicin show that cutaneous autonomic nerve fibers regenerate much faster than sensory nerve fibers (28)
