Eli5: if you get a bigger dose of a drug or a substance, does this mean that the drug becomes stronger or more long lasting?

Question

Also, how come low doses of certain substances (medicinal stuff) are better than high doses ? aren’t higher doses more effective?

In: Chemistry

Answer 1

This question is way to generic and open ended. Taking more of something isn’t always bed, and most every medication is dangerous when taken in too high doses. TYPICALLY (but not always), a dose is prescribed to maintain the effective concentration in the body. Your needed concentration can also change based on the reason you are taken the medication.