Dr. Dresdin

Dr. Dresdin is a doctor who lives in apartment 10-G of Bushwell Plaza. He first appeared in the episode, iFight Shelby Marx, when he gave Spencer allergy medication that wasn't yet approved in America (only approved in Cuba) and has many side effects. They included itching of the body, extreme thirst, muscle spasms, and memory loss.

He reappeared in iBeat the Heat, saying that he wanted to check on Spencer's allergies as an excuse to enter the Shay Apartment, the only one with air conditioning.

His last appearance was in iGo One Direction when he checked on Carly and Harry Styles, who contracted jungle worms. Dresdin failed to recognize that it had been quite a long time for someone to be sick and that Harry was just faking his illness from that point on. This was because Carly was waiting on him hand and foot.

Credits to

 * iCarly Wiki on Fandom