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Cyanocobalamin Nasal Spray Side Effects

It is possible for cyanocobalamin nasal spray to cause serious side effects in some people, so contact your healthcare provider right away if you develop problems like burning sensations of the skin or swelling of the arms or legs. Fortunately, most reactions to this drug tend to be minor. Nausea, headaches, and a runny nose were some of the most commonly reported reactions in clinical trials.

An Introduction to Side Effects of Cyanocobalamin Nasal Spray

Just like any medicine, cyanocobalamin nasal spray (Nascobal®) can cause side effects. However, not everyone who uses the drug will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are treated easily by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with cyanocobalamin nasal spray. Your healthcare provider can discuss a more complete list with you.)

Serious Cyanocobalamin Nasal Spray Side Effects

Some side effects of cyanocobalamin nasal spray are potentially serious and should be reported immediately to your healthcare provider. These include but are not limited to:
  • Burning, tingling, or pricking sensations of the skin
  • Swelling or tenderness in one or both legs
  • Swelling of the arms, hands, legs, ankles, or feet
  • Fever, sore throat, or other signs of infection
  • Nervousness or anxiety
  • A swollen or painful tongue
  • Signs of an allergic reaction, such as:
    • An unexplained rash
    • Hives
    • Itching
    • Swelling of the mouth or throat
    • Wheezing
    • Difficulty breathing.

Cyanocobalamin Nasal Spray Information

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