You actually can use the lozenges and gums while pregnant but only do so under strict medical guidance. My friend was a pack a day smoker, fell pregnant and had trouble quitting, she cut down to 10 a day, but was found it hard to stop those last 10. The doc told her to try NRT as it was better to do that than smoke. He went through it all with her step by step to make sure she didn't OD on nicotine and she managed to quit altogether.