A man goes to see his doctor:
-Doctor, last night I saw a crocodile at the window of my room.
-This is a laugh, here is a medicine to help you.
The next day the same patient comes back.
-Doctor, I saw him again the crocodile but this time he was at the foot of my bed.
The doctor increased the dose of his prescription.
the third day, the patient comes back very tired.
The doctor asks him:
"Have you seen the crocodile yet?
"Yes, but tonight he was near me.
The doctor gave him the highest dose allowed.
"With that, believe me, you will not see any crocodile anywhere.
The next day the patient did not return, nor the next day, nor during the whole week.
Relieved but still wanting to know if his patient was fine, he called his patient and it was his sister who answered.
-You do not know? He was swallowed by a crocodile it's been a week now.