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Symptoms of Hydroxocobalamin Allergy Allergic reactions to hydroxocobalamin can comprise various symptoms, which include: Immediate allergic reactions, which could be hives, tightness of the chest, difficulty breathing, or swelling of the throat, tongue, lips, and face

The cycle then enters the luteal phase during which estrogen increases by a lesser degree, and progesterone reaches its peak

Possible side effects may include: Pain, redness, or swelling at the injection site Mild nausea or stomach upset Headache or dizziness in some individuals Allergic reaction (rare)

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doi: 10.1007/BF02246209