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Some common side effects include: Mild nausea Stinging Swelling Burning Some serious side effects may include: Dizziness Drowsiness Slow/shallow breathing Mental/mood changes (such as confusion/nervousness) Shaking Seizures Vision changes (double vision/blurred vision) Ringing in the ears Fainting Pale/bluish/grey skin Fast/slow/irregular heartbeat Although allergic reaction is rare, get immediate medical attention if you have any of the following: Rash Itching Swelling of the face, tongue, or throat Severe dizziness Trouble breathing Storage Store lidocaine HCl injections at controlled room temperature

These symptoms progress gradually, but if untreated, could be permanent

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It was a sturdy box