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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Excessive Weight Gain While On Doxycycline Hyclate?

Hi, I have been taking Doxycycline Hyclate for the past 3 days and have gained 5 lbs. without changing my diet and exercise :/. I know that it s the pill that s making me gain the weight, but I m just not sure if it s a water retention where I would lose it right away after I stop taking it. I still have 4 more days to go :(. Once I stop the pill, how long will it take for me to start going back to my old weight? Thanks.
Mon, 10 Apr 2017
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Pathologist and Microbiologist 's  Response
There is no Fluid retention reported by people who take Doxycycline yet.
However expired Doxycyclin may cause a severe Kidney affectation.
Check the expiry date on the strip and then use it. Your weight gain may be because of something else.
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What Causes Excessive Weight Gain While On Doxycycline Hyclate?

There is no Fluid retention reported by people who take Doxycycline yet. However expired Doxycyclin may cause a severe Kidney affectation. Check the expiry date on the strip and then use it. Your weight gain may be because of something else.