My father is deathly allergic to penicillin. i've taken penicillin antibiotics before and had no problems. what are the changes i become allergic them?

Higher than average?: Although you are probably more likely than the average to develop an allergic reaction to penicillin also, it could come at any time or never at all. I have never seen any statistical analysis of this issue. If you need antibiotics now or in the future, discuss the issue with your prescribing doctor and he\she will advise you accordingly. There are alternatives, but all have risks.

Unlikely: Based on your history, it is unlikely that you will develop penicillin allergy.