The doctor is talking to the patient who is hooked up and receiving medication.
The patient has a needle in his arm.
While we do know that the doctor is talking to the patient and that the patient is receiving medication, we cannot know specifically that the patient has a needle through his arm. Hooked up could be referring to a heart monitor or other device. The medicine could have been separately administered at the same time. The first sentence is misleading because being hooked up and receiving medication are not mutually exclusive.
exists e1 e2 e3 s1 x1 x2 x3 x4.(n_doctor(x1) & n_patient(x2) & Theme(e3,x4) & Actor(e3,x1) & v_receive(e3) & n_medication(x4) & to(e1,x2) & a_up(s1) & Manner(e2,s1) & Theme(e2,x3) & v_hook(e2) & (x2 = x3) & Actor(e1,x1) & v_talk(e1))
exists e1 x1 x2 x3.(n_arm(x3) & of(x3,x1) & n_male(x1) & n_patient(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & in(x2,x3) & n_needle(x2))