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contain same drugs and act similarly.
Both these drugs are effective in preventing pregnancy
. Studies reveal when the drugs are taken regularly without a miss, it is effective in preventing upto 95-98% of pregnancies. That being said if there was a delay in starting the new regimen pregnancy is possible.
You can get your urine tested to confirm pregnancy.
If pregnancy is ruled out, all your current symptoms can be attributed to this new brand. In such a case changing the pills or stitching over to another form of contraceptive
Hope this helps.
Wish you good health