By taking penicillin can it make your period late the next month?

Possibly if on BCP's: Taking antibiotics alters the absorption of birth control pills (the estrogen and progesterone) through your intestine and consequently if you are on ocp's it indeed can alter your cycle. If a person is not on birth control pills then it is very unlikely that the penicillin will change your cycle.

Not typically: Likely your age, 44, is a more likely suspect for having a late period. As we enter our 40's there are more hormonal changes that can occur to the timing of our periods. Penicillin doesn't affect your hormones, though if you had a stressful illness the stress can cause delay in your period. Hope that helps!