Thyroid uptake measurements (I-123 or I-131), which are used to differentiate causes of hyperthyroidism, are generally unreliable in patients who have been taking amiodarone. Because of the high iodine content of amiodarone, the thyroid gland is effectively saturated, thus preventing further uptake of isotopes of iodine. However, a positive radioactive iodine can be used to rule in type 1AIT . Eye
Corneal micro-deposits (cornea verticillata, also called vortex or whorl keratopathy) are almost universally present (over 90%) in individuals taking amiodarone longer than 6 months, especially doses greater than 400 mg/day. These deposits typically do not cause any symptoms. About 1 in 10 individuals may complain of a bluish halo. Anterior subcapsular lens deposits are relatively common (50%) in higher doses (greater than 600 mg/day) after 6 months of treatment. Optic neuropathy, nonarteritic anterior ischemic optic neuropathy (N-AION), occurs in 1–2% of people and is not dosage dependent. Bilateral optic disc swelling and mild and reversible visual field defects can also occur. Loss of eyelashes has been linked to amiodarone use. Liver
Abnormal liver enzyme results are common in people taking amiodarone. Much rarer are jaundice, hepatomegaly (liver enlargement), and hepatitis (inflammation of the liver).Low-dose amiodarone has been reported to cause pseudo-alcoholic cirrhosis. Skin
Long-term administration of amiodarone (usually more than eighteen months) is associated with a light-sensitive blue-grey discoloration of the skin, sometimes called ceruloderma; such patients should avoid exposure to the sun and use sunscreen that protects against ultraviolet-A  and -B.
Palatal myoclonus is a rare condition in which there are rhythmic jerky movements or a rapid spasm of the palatal (roof of the mouth) muscles. Chronic clonus is often due to lesions of the central tegmental tract (which connects the red nucleus to the ipsilateral inferior olivary nucleus).When associated with eye movements, it is known as oculopalatal myoclonus. Signs and symptoms
Signs and symptoms of Palatal Myoclonus include:
- A rhythmic clicking sound in the ear due to the opening and closing of the Eustachian tube.- Rhythmic, jerky movements in the face, eyeballs, tongue, jaw, vocal cord or extremities (mostly hands). Diagnosis
Classifications
physiologic, essential, epileptic, and symptomatic

Treatment
Drugs
Drugs used to treat palatal myoclonus include clonazepam, carbamazepine, baclofen, anticholinergics, tetrabenazine, valproic acid, phenytoin, lamotrigine, sumatriptan, and PIR. A rare case of palatal myoclonus that associated with orofacial buccal dystonia has been treated with Botulinum toxin A (Dysport) injection and counseling. Notes
http://www.tchain.com/otoneurology/disorders/central/opm.html
https://www.hindawi.com/journals/criot/2013/231505/
"NINDS Tremor Information Page". National Institute of Neurological Disorders and Stroke. July 20, 2007. Archived from the original on October 6, 2007. Retrieved 2007-10-08. References


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