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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Drowsiness And Headache While On Letrozole?

My 1st dose of Letrozole 2.5mg began 3/13/18 at 3pm...On 3/17 decided to dose at 11:00pm hereon. Soon after, I am experiencing drowsiness, feel heavy headed or on verge of headache. In addition feel as though upper inner eyelids are swollen. Bedtime, I take 1-low dose aspirin & 1-500 mg Tylenol for hip pain. Is the Tylenol dose acceptable, 1 hour following Letrozole? Thank you for responding.
Mon, 2 Jul 2018
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Internal Medicine Specialist 's  Response
Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.

In few patients letrazole may cause head ache.

Letrozole can sometimes cause headache, nausea (feeling sick) and vomiting (being sick). Simple pain relief such as paracetamol may help with headache, and anti-sickness medication can be prescribed if you have nausea or vomiting.

yes you can take Tylenol before letrazole.

Hope I have answered your query. Let me know if I can assist you further.
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What Causes Drowsiness And Headache While On Letrozole?

Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. In few patients letrazole may cause head ache. Letrozole can sometimes cause headache, nausea (feeling sick) and vomiting (being sick). Simple pain relief such as paracetamol may help with headache, and anti-sickness medication can be prescribed if you have nausea or vomiting. yes you can take Tylenol before letrazole. Hope I have answered your query. Let me know if I can assist you further.