Mechanism of Action
Medicine is not effective if a woman is already pregnant. Generic Plan B is believed to act as an emergency contraceptive principally by preventing ovulation or fertilization by altering tubal transport of sperm and/or ova. It may inhibit implantation by altering the endometrium. It is not effective once the process of implantation has begun.
Take Generic Plan B One-Step orally as soon as possible within 72 hours after unprotected intercourse or a known or suspected contraceptive failure. Efficacy is better if the tablet is taken as soon as possible after unprotected intercourse. The drug can be used at any time during the menstrual cycle.If vomiting occurs within two hours of taking the tablet, consideration should be given to repeating the dose.
Drugs or herbal products that induce enzymes, including CYP3A4, that metabolize progestins may decrease the plasma concentrations of progestins, and may decrease the effectiveness of progestin-only pills. Some drugs or herbal products that may decrease the effectiveness of progestin-only pills include:
- Barbiturates,bosentan, carbamazepine,felbamate, griseofulvin,oxcarbazepine,
- Phenytoin, rifampin
Advantages and disadvantages
The main advantage of this pill is the chance to prevent pregnancy after unprotected sex. The main disadvantage of pills is that they only protect a woman from a single contraceptive emergency, and it is common for a woman to have multiple episodes over her lifetime.
Allergic reaction to this pill include; hives, difficulty breathing, swelling of your face, lips, tongue, or throat.
Store at controlled room temperature, 20° to 25°C (68° to 77°F); excursions permitted between 15° to 30°C (59° to 86°F) .