長水痘被誤當作發燒吃藥后，需要根據所服用的藥物種類、服用劑量、自身癥狀以及水痘的發展情況來綜合判斷處理方式。一般來說，可能需要觀察身體反應、多喝水促進代謝、必要時就醫等。 1. 藥物種類：如果服用的是退燒藥如對乙酰氨基酚、布洛芬等，通常影響不大，但仍需觀察有無異常。 2. 服用劑量：少量服用一般問題不大，若過量服用可能會增加不良反應風險。 3. 自身癥狀：留意有無惡心、嘔吐、腹痛、皮疹加重等不適。 4. 水痘發展：觀察水痘是否繼續增多、有無感染跡象。 5. 就醫時機：若出現嚴重不適或水痘癥狀明顯加重，應及時就醫。 總之，長水痘誤吃藥后不要過于驚慌，密切觀察自身情況，多數情況下不會造成嚴重后果。但一旦有異常，務必及時尋求醫療幫助。

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