I was taking it 50 mg every six hours. But what has happened? I have missed the dose and I took two at once. I know that I should not do that and I don't know what I was thinking about while taking it but it has happened. I am afraid of overdose. How much of diphenhydramine is an overdose?
Quick Answer. The train was first invented and patented in 1784, by James Watt. The first working model to be made and successfully run was created in 1804 by Richard Trevithick. Continue Reading.
Report Abuse. Even though most people think that it was George Stephenson was the person to invent the first steam train. The actual first train was built by Richard Trevithic built the first functional steam locomotive. See below: Trevithick was fascinated by the possibilities of steam engines.He experimented with a model locomotive, and in 1796 produced a working engine/boiler combination.any say it was George Stevenson, But it was supposed to be Richard and Andrew Trebethic who actually first invented the steam engine. The first steam powered, metal contraption that was train-like was Hiron of Alexandria in 100AD.