 3. taking medication which can have an action on blood pressure or regulation vasoconstrictors, vasodilators, beta-agonists and antagonists, nitrates, theophylline, dipyridamole, sildenafil, immunosuppressive, corticosteroid or Non-steroidal anti-inflammatory drugs 10 days, hormonal therapy, sedative drug antidepressive, anxiolytics, hypnotics drops with activity on regulation of ocular pressure beta-blockers 