If you have allergies, pregnancy can make your symptoms worse. 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.
free radical. (chemistry). An atom or a diatomic or polyatomic molecule which possesses one unpaired electron. Also known as a radical.ree radical. in chemistry, a molecule or atom that contains an unpaired electron but is neither positively nor negatively charged. Free radicals are usually highly reactive and unstable.
Radical. A Radical is an individual and a party standing on the extreme left of the political spectrum. They are also called leftists or left wingers. A radical is often impatient and is in favor of a radical change or reform. A radical party has political leanings towards socialism or Marxism and does not favor private property or private entrepreneurship.