<p><strong>Parkinson&#39;s disease</strong>:</p>

<ul>
	<li>Adult: Initially, 100 mg/day, increased to 100 mg bid after a wk or more. Max dose: 400 mg daily.</li>
	<li>Elderly: &gt;65 yr: Lowest effective dose.</li>
</ul>

<p><strong>Prophylaxis of influenza A</strong>:</p>

<ul>
	<li><strong>Adult</strong>: 100 mg daily for up to 6 wk; when used with influenza vaccination: only up to 3 wk after vaccination.</li>
	<li><strong>Child</strong>: 10-15 yr: 100 mg daily.</li>
</ul>

<p><strong>Influenza A</strong>:</p>

<ul>
	<li><strong>Adult</strong>: 100 mg daily for 5 days.</li>
	<li><strong>Elderly</strong>: &gt;65 yr: Daily dose of 1 day.</li>
</ul>

<p><strong>Herpes zoster in immunocompromised patients</strong>:</p>

<ul>
	<li><strong>Adult</strong>: 100 mg bid for 14 days, continued for another 14 days if pain persists.</li>
</ul>