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Dr. Andrew Rynne
Dr. Andrew Rynne

Family Physician

Exp 50 years

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No period, negative pregnancy test

I have been prescribed antihistamines for a wierd allergic reaction i have been having since last june, all blood tests and allergy tests have come back clear, but the doctor has prescribed antihistamines for a period of 6 weeks. I have been taking these for 3 weeks so far.
My period is usually very accurate and i always get it on the 16th of the month however i have not had one this month and have done about 7 tests all saying not pregnant.
Will this have anything to do with the medication i am taking? I have had afew funny feelings like i may be getting period pains but nothin has ever come of it.

Thank you
Tue, 25 Jan 2011
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Question is related to
Diseases and Conditions
Lab Tests ,  
OBGYN 's  Response
Antihistamines are not supposed to cause menstrual problems.If you havent got your period and pregnancy test is negative there could be 2 reasons1.stress 2.pathology.
I suggest you wait for a few more days and then get an ultrasound just to rule out any pathology.If its normal,see a gynaecoligist for drugs for withdrawal bleeding.However,you still may get your period soon.
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  User's Response
Emma's  Response
Thank you, I have been told that my 'allergy' problem is also due to stress as since it started i have also had some difficulties in my life, so it may all be due to my stressful nature. Ill make an appointment tomorrow

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