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Viagra and Penicillin interaction - Online Doctor Chats

Date : 21-Feb-2012
User rating for this question
Very Good Posted in: Men Sexual Problems
Answered by

General & Family Physician
Practicing since : 2005
Answered : 2322 Questions
Doctor :   Hi
User :   Hey there
User :   I have a few questions about my current viagra prescription if thats okay
Doctor :   yes
Doctor :   Please go ahead
User :   okay well the last few months i have been using viagra for my performance anxiety...it has been working splendid...until last night
User :   i was able to get an erection but i was unable to maintain it (i took about 50mg of viagra)
User :   it might be important to note that im currently on antibiotics (phenoxymethylpenicillin)...would this cause any intereference with the viagra?
Doctor :   May I know the time difference between their individual dosage?
Doctor :   May I also know your age?
Doctor :   I would like to know if you have any diagnosed medical conditions
User :   sure...i take the antibiotics 4 times a day every six hours...and i took the viagra and a dose of the antibiotics around the same time (give or take an hour). this is the first time ive mixed antibiotics with my viagra
User :   im 20
User :   and i have no medical conditions
User :   it might also be helpful that it was the first time i got a severe headache from the viagra...aswell as hot flushes
User :   every other time it has been fine
Doctor :   Ok Viagra and Penicillin group of antibiotics have no interactions per se
Doctor :   The other side effect and most common is headache and flushes , I hope you are aware of this
User :   i am yes, but have never experienced them until now
Doctor :   In that case, you can reduce the dosage and use it and see how it performs
User :   the dosage of the antibodies or the viagra?
Doctor :   Viagra
Doctor :   As I said, Antibiotics have no interactions with Viagra
Doctor :   under testing conditions
Doctor :   since you experience some side effects
User :   alright...sorry for the silly question but how would a smaller dose of the viagra help?
User :   lookin at the tablet now, id say i took about 70% of it...not half
Doctor :   The smaller dose can relieve you of side effects
User :   ok well side effects are not really the problem
User :   my main problem is the fact that the viagra didnt really work
Doctor :   and with minimal change in performance
User :   i got an erection but lost it within minutes
Doctor :   Ok
Doctor :   If Viagra does not help, you should be looking at other alternatives
User :   is there any reason why it would not work when every other time it has worked fantastic?
Doctor :   You are fully sensitised to it and the mechanisim of action is not lasting long
User :   is it possible to become sensitised to it after only a few months though? and only using maybe 1 tablet every 2 weeks if that
Doctor :   Yes
User :   okay, so what options can i explore? would a different ED medication work?
Doctor :   All the medications are PDE group ( Phosphodiesterase Inhibitors), the duration of action differs, but few times there is a possibility of result
Doctor :   on trying other in the same group
Doctor :   We cannot predict the result unless one takes it
User :   alright, so maybe i should talk to my doctor about trying a different ED medication then?
User :   and see how it goes
Doctor :   Did your doctor approve of taking Viagra for so long?
User :   he did indeed
User :   he wrote me a prescription as i live in aus
User :   and we cannot just order it over here
Doctor :   yes, it is prescription medication in most parts of the world
User :   right
Doctor :   So you are left with fewer options, trying a different medication
User :   right
User :   i have another question about viagra if thats okay
Doctor :   yeah please go ahead
User :   if i doubled the frequency of my masturbation prior to having sex...could that effect the effects of the viagra...as in im not as aroused as i should be for it to work at full potential
User :   because i masturbated a few hours before having sex with viagra, which i dont usually do
User :   so i thought that might of somehow effected my sex drive, which in turn effected the viagra
Doctor :   Generally speaking, not relating to viagra use, a masturbation just few hours before sex has less stimulation and less frequent impulses to the centre.
Doctor :   The stimulation is directly proportional to the hardness of the erection
User :   okay thats what i thought, that makes me feel a little bit better
Doctor :   So if you plan for an intercourse, it is good to give a pause and not masturbate for a day
Doctor :   did you follow?
User :   i understand indeed!
User :   in the mornign i was getting pretty hard erections but was a little nervous to try and have sex due to what happened the night before (having problems maintaining an erection)
User :   i guess the fact that im still a little bit sick could have effected my sex drive? true or false?
Doctor :   True
User :   okay well thats good, im starting to feel a lot better about this whole situation
User :   i was quite destressed when it didnt work well
User :   and have been distressed about it all day
Doctor :   Destress yourself, go for a good jog
Doctor :   Hot water shower or bath tub
User :   that sounds like a good idea! i find it hard to not worry about things like these, especially when it comes to sex
Doctor :   I understand
User :   especially at my age
Doctor :   True
User :   ok so could the fact that i was feeling a little ill and had masturbated earlier caused the problem i had?
User :   does that seem like the logical reason?
Doctor :   A good possibility
User :   so what advice would you give me next time i have sex?
Doctor :   Well, try without viagra, destress yourself, do not masturbate when you plan for intercourse. Pump up confidence within you
Doctor :   If it does not work, start with lowest dose of Viagra
Doctor :   This is my sincere opinion
User :   okay great
Doctor :   If you give a viagra break, I think you should be performing as earlier
User :   one more question before my time runs out
User :   im a skinny guy with a fast metabolism, i took viagra and then after 2 hours i began foreplay....could it be that the viagra was wearing off my system?
Doctor :   It is generally said to have viagra one hour before actual intercourse
User :   thanks so much
User :   you made me feel a lot better!
User :   okay great
Doctor :   Ok
Doctor :   Thank you
Doctor :   Bye for now
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