<p>Warfarin can not be administered in the following cases;</p>

<ul>
	<li>Actual or potential hemorrhagic conditions, eg. Peptic ulcer, or to patients with uncontrolled hypertension</li>
	<li>Severe hepatic or renal disease</li>
	<li>Pregnancy</li>
	<li>Known hypersensitivity to warfarin</li>
	<li>Bacterial endocarditis</li>
</ul>

<p>Its use within 24 hours following surgery or labor should be undertaken with caution, if at all.</p>