Hi, yes, there's a difference between these two words; they usually mean completely different things. As verbs, pull means to bring something towards yourself and drug means to give someone a drug to incapacitate them. As nouns, a drug is a substance that can be a medicine or a narcotic and a slang use of pull can be a single inhalation of a smoked drug. I'm guessing your question stems from the last set of meanings?

Hi grSeva, When you exert a force to bring something closer to you, you exert a "pull" on that object. For example, you need to "pull" your car door in order to open it. When you are inside the car, you "pull" your car door to close it. Both actions bring the car door closer to you. When you [drag] something, you are also exerting a "pulling" force. This is the similarity. However, when something is very heavy and you need a great deal of effort to "pull" it (usually across the floor or a surface and for a longer time), this is when you are "dragging" it. This is a difference. "Drag" can also be used to express an unwillingness to move. For example, my dog hates baths, and I have to "drag" him to the shower room. I hope this clears the air.

Pull and drag. A bit different. To pull is to draw along. To drag is to pull with difficulty against resistance. Drag is also more casual.

Thanks to all of you. It really helped. Even though, gave me more unknown words than it was before.XD