Difficult question: It is possible after a few doses have been taken. Throat tightening is one symptom that can be caused by anaphylaxis (one of several likely symptoms). Throat tightening can be due to many other less sinister causes. Most importantly, the next dose could be deadly if the episode was caused by anaphylaxis. For this reason, call the prescribing doc for recs and consider consultation with an Allergist
Answered 1/1/2016
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