Essential Oil Blends for Asthma. A good approach is to blend oils that tackle all the causes behind asthma. You want a good anti-inflammatory, an antispasmodic, and an antihistamine blend. Eucalyptus is probably the strongest antihistamine on the list, so this will make the base of all your blends.
Drug use early during pregnancy can affect the developing organs and limbs of the fetus. Even one episode of drug use during this period can affect the development of your child. Often the result is a birth defect or miscarriage. Drug use later in pregnancy can affect development of your baby's central nervous system.
But you're right to worry about taking allergy medicine during pregnancy. Pregnant women shouldn't take some allergy drugs. Certain antihistamines, however, are safe. Check with your doctors -- your OB/GYN and your allergist -- to find out how to manage allergies while you're pregnant.