 [ Symptoms ] my health insurance no longer covers my prescription for allegra d is there an over the counter option that works [ Disease ] assuming you adhere to the proper doses these two medications are compatible please be advised that children can have a paradoxical effect with benadryl in other words an antihistamine like benadryl that would make you sleepy can make a two year old hyper and more active this may not be desirable at bedtime do not forget that saline nose drops or sprays and the use of a cool mist humidifier at bedtime is also very helpful for colds