The level of AFP in the blood is used in a maternal serum triple or quadruple screening test. Generally done between 15 and 20 weeks, these tests check the levels of three or four substances in a pregnant woman's blood.n alpha-fetoprotein (AFP) blood test checks the level of AFP in a pregnant woman's blood. AFP is a substance made in the liver of an unborn baby (fetus).
Common mirtazapine side effects include: 1  drowsiness, dizziness; 2  strange dreams; 3  vision changes; 4  dry mouth; 5  constipation; 6  increased appetite; or. 7  weight gain.
If you still find a powerful sedative effect from mirtazapine, you should be advised to keep the dose of codeine low. If you are adjusted to the sedative effect, you can safely take whatever dose of codeine your doctor advised.