Be a bit more specific. Male or female contraceptives?

If you mean male, there's vasectomy available from most leading urologists in town.
If you mean 'French letters', 'Capote Anglaise', prophylactics, condoms etc, it is extremely doubtful whether you will find many brands that will fit you here, unless you are 'locally sized'.

As many have already said, all pharmacies stock them, though I would presume that Mercury Drug, a known importer from the U.S.A., would be the most likely to have 'Western' sizes.
There are many family planning clinics here, in almost every barrio and barangay. Almost every female GP/OBS/GYNAE in DGT, runs a family planning clinic but I fear that most of the staff, including the doctors, may not be willing to either make an exact measurement or 'guarantee' you a perfect fit.......

 

Mercury Drugs is not the answer for western fits either; however, you get a nice smile and raised eyebrows from the ladies behind the counter when you make your inquiries.

 

Watson's products of this subject only fit for finger banging....

 

Thanks for the excellent information, reading up on the pills is sure scary.....

 

Father time has morphed my asawa into my mother-in-law, and now I get to support both of them...

Lucky me.

 

I use 140mm size condoms and found them in town at a pharmacy. Still a VERY snug fit....

 

Sounds like you're just a bunch of big dicks..... :D

 

140mm....Kinda short isn't it?

 

It looks like we are all in agreement that, unfortunately, none of us have found Magnum-size raincoats available here (and most asian countries), so perhaps I can suggest an alternative solution (probably worse case - last resort). I have heard there is a clinic here in town that does penis extensions. I would bet that they would not charge you, and in fact probably pay you, for a penis reduction. There are plenty of little guys who would gladly bid for your chop off and as a result you could go forward wearing the local protection attire. Just an idea....