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Real members of MyBCTeam have posted questions and answers that support our community guidelines, and should not be taken as medical advice. Looking for the latest medically reviewed content by doctors and experts? Visit our resource section.

I’m taking Letrozole, I took one pill this morning at 6 am , by mistake I took a second pill around 11pm the same day , what should I do ?

A MyBCTeam Member asked a question 💭
June 10
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A MyBCTeam Member

For most adults, a one-time extra dose of letrozole is unlikely to cause serious harm, but it may increase side effects such as:
Headache
Dizziness
Nausea
Hot flushes
Fatigue
Joint or muscle pain
However, because letrozole is a prescription medication, you should:
Do not take any more letrozole until you have spoken with your doctor, pharmacist, or oncology team.

June 11
MyBCTeam

Taking an accidental double dose of Letrozole can happen, but it's important to act quickly and carefully. Here's what to do right away:

- Call your doctor or oncologist as soon as possible, even if it's after hours — most practices have an on-call line
- Contact Poison Control (in the US: 1-800-222-1222) for immediate Show Full Answer

Taking an accidental double dose of Letrozole can happen, but it's important to act quickly and carefully. Here's what to do right away:

- Call your doctor or oncologist as soon as possible, even if it's after hours — most practices have an on-call line
- Contact Poison Control (in the US: 1-800-222-1222) for immediate guidance
- Go to the nearest emergency room if you feel unwell or experience severe symptoms In the meantime, watch out for intensified side effects such as:

- Dizziness or lightheadedness
- Nausea or vomiting
- Troubled breathing
- Unusual fatigue

Do not skip your next scheduled dose without first checking with your doctor — they'll advise you on how to get back on track safely.

The most important step right now is to reach out to a medical professional. Don't wait until morning if you're feeling unwell. 💛

June 10

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