Mast cells. Mast cells and basophils are generally thought to be the major sources of histamine and can themselves be modulated by histamine as they express H 1, H 2 and H 4 receptors, although how this varies between different mast-cell types is not yet clear.
3. The pill is to be taken soon after unprotected sex. It should be taken preferably within 24 hours and before 72 hours or else the pill may turn useless. 4. I-pill checks pregnancy by preventing ovulation or fertilisation or implantation of the fertilised egg. 5. I-pill is 95 per cent effective if taken in time.
Do not do that, your birth control pills contain hormones that affect they way your body works. As with all medicines it is dangerous to take more pills than the doctor tells you to take.ES! You need to get the Morning After Pill, which may be taken up to three days after intercourse. Birth control pills are meant to be taken BEFORE having protected sex, in f â¦ act, you need to take them regularly. If you do not take them regularly, then they also won't be effective.