<p>Fever, headache, vomiting, dizziness, drowsiness, nausea, chills.<br />
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Potentially Fatal: Severe hypersensitivity reactions may occur especially in the treatment of onchocerciasis where rare Mazzotti reaction characterised by rash, itching, headache, muscle and joint pains, tachycardia, postural hypotension may start within 2 hr of drug administration. Encephalitis and retinal haemorrhage</p>