Originally Posted by
atomic sagebrush
That depends on how well it works for you. It works super well for me so I take the smallest dose split in half, but others need more.
Any antihistamine will help to dry up CM. The reason I like Zyrtec (aka cetirizine, Reactine) is it's relatively nondrowsy and it lasts for a good 24-48 hours after taking it (it takes about 6 hours to get rolling tho so be sure you take it at least 6 hours in advance of your attempt.)
Most other OTC antihistamines like Benadryl (diphenhydramine) act faster but don't last as long, so if you want to use one of the other kinds, you can take one 1-2 hours before you BD and it will last 4-6 hours afterwards. For people who really don't know when they're going to O, that may be the best option because it won't stay in your system and keep you dry for days afterwards.
If you REALLY have a lot of EWCM, it is possible to use BOTH Zyrtec and Benadryl. They act on different parts of the system and you don't overdose yourself by taking both of them (this was confirmed to me by doctors including an allergist, and also pharmacists as well.) I do not know if it's possible to combine any other antihistamines, only Zyrtec and Benadryl (cetirizine and diphenhydramine)
The one thing I don't like women to take is Sudafed (it's not an antihistamine, but also dries up CM and is advised on some of the other sites.) It's been linked to hemmorhagic strokes in young women, particularly who were taking blood thinners (aka cranberry or aspirin) and who were taking it in a higher than normal dose for several days in a row (like, swayers.) Plus it has wicked side effects. If you like, you can give your husband Sudafed 1-2 hours before DTD, it will lower his pH and dry up his semen a bit.