Can one tablet of Efectin be followed by weakness, followed by agitation?

Hello. I took only one tablet of Efectin 75 and after 2 hours I felt such a downhill. I felt high. I had the impression of shortness of breath. Breaths helped a lot. Snorting air with your nose and letting it out with your mouth. After an hour, this state passed. And suddenly I became very agitated. My pupils got bigger, and I suddenly wanted to get up and do something. I even started talking more and I felt that it was not very natural. Are these normal symptoms after just one tablet? To be honest, I'm afraid to take the second one. That he would experience the same thing again. I felt drunk at first and then stoned. I apologize for the thyness but that was my feeling. The doctor advised me to take one tablet a day. And I feel like it's a very strong drug. I can't split the pill because it's a powder capsule inside.