Hmm...I'm not sure. I would say, as long as you have enough of whatever drugs you need, plus the prescriptions, then there shouldn't be any problems. This would be good, both if customs should say anything (though I highly doubt it) or if you should lose/run out of medication.

If you're not sure, you could always contact the British Consulate...there should be one in Boston and/or NY and ask.

And you'll be fine!!! How exciting, first trip abroad! *g*