Why are poisons and medicines made of the same substance but given with different intentions?

what is the difference between a basal thermometer and a normal household digital one?

is it normal for your pee to smell different???

I've smoked weed before and I love it!! and im curious about E pills. are the side effects different?

What's the differences between laxatives and colon cleansers?

What's the difference between the Flu and common cold? Just wondering.

whats the fastest way to get rid of poison?!?!

can my health be at risk if I get pregnant and my husband is too tall for me?

Does the condom machines in public bathrooms sell the three different sizes of condoms?..just wondering..

Does anyone take medicine to slow their heart?? if so, please tell me some of the side affects so I know if it's normal or so...

Just wondering, what is the difference between Eczema, and Psoriasis? And, what causes those skin problems?