Because taking it on an empty stomach increase the amount absorbed (by about 30%) -- which causes a greater effect of the medication and can spike your blood pressure down/make you super dizzy. That's why it's best to take it anytime after the same meal each day, preferably within 30min after eating. Less variations in BP.
- Flomax Information for Consumers
- Flomax Information for Healthcare Professionals (includes dosage details)
- Side Effects of Flomax (detailed)
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