Klonopin (Clonazepam) Side Effects, How it Works, Upsides & Downsides

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Klonopin Side Effects. Common side effects of Klonopin include: upper respiratory tract infection, dizziness, drowsiness, and ataxia. Other side effects include: vaginitis, rhinitis, hypersensitivity reaction, increased cough, nervousness, depression, fatigue, myalgia, dysarthria, sinusitis, and reduced intellectual ability. See below for a comprehensive list of adverse effects.

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