<p>As with any other antihistamine therapy, Pseudoephedrine, guaiphenasine &amp; triprolidine may cause drowsiness. If affected, patients should be advised not to drive or operate machinery. Concomitant administration of alcohol or other centrally acting sedatives should be avoided. Although Pseudoephedrine has no pressor effects in normotensive patients but Pseudoephedrine, guaiphenasine &amp; triprolidine should be used with caution to patients suffering from mild to moderate hypertension. Moreover, caution should also be exercised in the following disease conditions - hypertension and heart disease, diabetes, hyperthyroidism, elevated intra-ocular pressure, prostatic enlargement, severe renal and hepatic impairment. This preparation should not be used for persistent or chronic cough, which occurs with smoking, asthma or emphysema or where excessive secretions accompany cough, unless directed by a physician.</p>