Take Action is essentially the same as Plan B. Both contain the exact same active ingredient, levonorgestrel, in the exact same dose of 1.5 milligrams, taken as a single pill. The only real difference is the brand name on the box and the price. Take Action is a generic version of Plan B One-Step, which means it works the same way, has the same side effects, and is held to the same safety and manufacturing standards by the FDA.
Same Ingredient, Same Dose
Plan B One-Step was the original brand-name emergency contraceptive pill using levonorgestrel, a synthetic version of a hormone your body already produces called progestin. When the patent exclusivity window closed, other manufacturers began selling identical products under different names. Take Action is one of several generics, alongside brands like My Way, AfterPill, and others.
Every one of these products delivers 1.5 mg of levonorgestrel in a single tablet. There is no formulation difference, no variation in release speed, and no difference in inactive ingredients that would meaningfully change how the pill works. Choosing between them is like choosing between brand-name and store-brand ibuprofen.
How They Both Work
Levonorgestrel prevents pregnancy by delaying or blocking ovulation. If your body hasn’t released an egg yet, the pill can pause that process long enough for sperm to die off (sperm survive about five days in the reproductive tract). It does not interrupt a pregnancy that has already begun, and it will not harm a developing embryo.
Timing matters more than brand. The pill is most effective when taken as soon as possible after unprotected sex and should be taken within 72 hours (three days). Effectiveness drops with each passing hour, so taking it on day three is significantly less reliable than taking it within the first 12 to 24 hours.
How to Take It
Swallow the single tablet with water. That’s it. If you vomit within two hours of taking the pill, contact a healthcare provider because you may need a second dose. Both Take Action and Plan B are available over the counter with no age restriction and no prescription required.
Weight Can Affect How Well It Works
This is one of the most important things most people don’t know about levonorgestrel emergency contraception, regardless of brand. Research shows its effectiveness starts to decline at around 155 pounds (70 kg) and may offer little to no protection at 176 pounds (80 kg) or above.
The reason is straightforward: at higher body weights, the standard 1.5 mg dose produces peak blood levels of the drug that are roughly 50% lower than in someone under 155 pounds. The hormone simply gets diluted across more body mass. For people with a BMI of 30 or higher, the odds of the pill failing are more than four times greater compared to those with a BMI under 25.
If you weigh more than 155 pounds, a different type of emergency contraceptive pill that uses a different active compound may be more effective. A copper IUD, inserted within five days, is the most effective emergency contraception option at any weight. A pharmacist can help you figure out the best choice for your situation.
Common Side Effects
Because Take Action and Plan B are identical products, they share the same side effect profile. The most common effects include nausea, fatigue, headache, dizziness, breast tenderness, and abdominal cramping. These typically resolve within a day or two.
The bigger disruption for most people is to their next menstrual cycle. Your period may arrive earlier or later than expected, and the flow might be lighter or heavier than usual. Spotting between periods is also common. If your period is more than seven days late, take a pregnancy test. A late period doesn’t necessarily mean the pill failed, but it’s worth confirming.
The Only Real Difference: Price
Plan B One-Step typically costs more than Take Action because it’s the brand-name product. Prices fluctuate by retailer, but generics like Take Action generally run $10 to $25 less than Plan B. Since the medication inside is identical, paying more for the Plan B label doesn’t get you a better product. If the pharmacy or store shelf has Take Action in stock and Plan B is sold out (or vice versa), grab whichever one is available. Speed matters far more than brand.