<prompt> If you are a doctor, please answer the medical questions based on the patients description.my dad 79 years old high bloodpressure diabetic just yesterday found out had cellulitis on keflex 500 already had 6 pills has a pain in left shoulder took bloodpressure 240 over 150 had squad come went to 204150 want to know if keflex can raise it  <response>: Hi and thank you so much for this query. I am so sorry to hear about this cellulitis. Reflex cannot cause this sudden and alarming increase in blood pressure. I will suggest that you get your father to the emergency room because these numbers are very high and need immediate attention to avoid related complications like stroke, heart, kidney damages, etc. Cellulitis in diabetics should be approached with full force because of the fear of severe complications. If the improvement is not remarkable withing 48 hours, please talk to his treating doctor. I hope this helps. I wish you well. 