Where appropriate, consideration should be made to providing concomitant treatment with a proton pump inhibitor. • Patients with clinically significant infection requiring the use of antibiotics, antifungals, or antivirals, or who have completed prior anti-infectious therapy within 14 days of starting treatment should be treated with caution unless the use of antibiotics and antivirals were for prophylaxis purposes. • Patients with a prior history of autoimmune disease (including systemic lupus, inflammatory bowel disease, psoriasis and rheumatoid arthritis) should be treated with caution. • Monitoring of laboratory test results is recommended including standard haematological and blood chemistry tests. • Patients receiving the following medicinal products should be treated with caution (see section 4.5) -Beta-blockers or other anti-hypertensive agents. -H1 blocking agents and neuroleptics (anti-psychotics) with H1 receptor blocking properties. -Tricyclic anti-depressants that may have H1 and H2 receptor blocking properties. -Monoamine oxidase inhibitors and anti-malarial and anti-trypanosomal agents. -Neuromuscular blocking agents, narcotic analgesics, and various contrast media.