Child 2 years 4 months says very little dreams

Hello! My son, 2g 4 months, does not speak, from real words - only mom and dad. At the same time, he understands the speech, he himself is explained with the help of gestures and sounds (for example, he wants to sleep: he points at himself with a finger and closes his eyes; he broke the machine: he said the drrr memory). He is not silent, many gestures / sounds come from him during the day, he remembers a lot and tells his own way. Recently I started going to kindergarten, but now I’m sick a lot, so I’m actually attending a little garden. Otherwise, the development is normal, comparing his drawings and crafts in kindergarten with other children's handicrafts - not worse; colors distinguishes, puzzles collects, etc ... Tell me, is the neurologist's appointment shown to us and most likely a drug treatment? A year ago, a pediatrician prescribed pantoaccin for 1.5 months, was transferred very poorly, although it was administered gradually. Effect not noticed. Appealed in the same way with a delay in the development of speech. Thank.