I have seizures and currently a cold. Do over counter cold meds lower seizure threshold? If not, is there one I can use?

Typically no.. Common cold meds such as advil-cold or tylenol-cold do not have significant seizure threshold lowering effect...But high fever does.
Rx for colds w sz's. Any over the counter medicine is alright to use with medicines to prevent seizures. Dayquil for example might help.