I don't know if I'm allergic to any medication. (not - take - over the counter medicine)
If I were you, I wouldn't take any over the counter medicine
I'm feeling dizzy. (see a doctor)
If I were you, I would see a doctor
I'm travelling to Mexico. (buy - travel insurence)
If I were you, I would buy travel insurance.
My eyes are burning. (buy yey drops)
If I were you, I would buy eye drops.
I'm feeling a little under the weather. (not - go to the party)
If I were you, I wouldn't go to the party
I'm exhausted! I went to bed late. (sleep - earlier)
If I were you, I would sleep earlier