Health Canada advises consumers that it has received reports that some packages of the Alesse contraceptive pill contain broken tablets or pills that are smaller than normal, which could make the medication less effective.
The government says it has learned of complaints that in packs of Alesse 21 and Alesse 28, there has been at least one pill that is about half the size of the others.
He says that the reduced size can also reduce the effectiveness of the medication to prevent pregnancy.
Here is a side view of Alesse 28 blister with a small piece missing in one of the pills, surrounded by a red circle. (Health Canada)
Health Canada says the complaints involved a package of Alesse 21, which contains 21 active contraceptive pills that expire in August 2018, and a package of Alesse 28, which contains 21 active contraceptive pills and seven tablets that they do not contain hormones, which expires in April 2019.
But the government says it is not sure if the problem is isolated from those many pills, and is working with Pfizer Canada to determine the extent of the problem.
Canada is advising consumers to check their pills before taking them and not to take them if they look unusual, such as a lighter color, jagged edges, or a broken or smaller tablet than normal.
Advises consumers who find a pill rarity not to take it, but to go to your pharmacy and get a replacement pack so you do not miss a day of the pill, which can increase the chances of pregnancy.
Health Canada is asking pharmacists to observe each blister pack of Alesse 21 and Alesse 28 before dispensing it to make sure the pills look normal.
Pfizer said in a statement that it continues to monitor the situation and badess the need for additional measures.