Dermatological: Pruritus/itching, skin rashes, exacerbation of allergic rash.
Nervous: Headache, vertigo, fatigue, malaise, nervousness, drowsiness, insomnia/sleeplessness.
Hepatic: Elevation of transaminases, alkaline phosphatase or blood urea nitrogen (BUN) levels, There is some evidence that doses of 8 g/day may produce hepatotoxicity.
Genitourinary: Polyuria.
Other Adverse Effects: Arthralgia, cold-like reaction (sinusitis).
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