Pharmacy de la gare, near the train station on Moinvong.

As mentioned on the US embassy list
http://cambodia.usembassy.gov/medical_information.html

PHARMACIE DE LA GARE
N° 81Eo, Preah Monivong, 12201, Phnom Penh
Tel/Fax: (855) (0)23 430 205
Mobile: (855) (0)12 805 908 / (855) (0)16 805 908
Email: nmc [at] worldmail [dot] com [dot] kh
W/H: 7am – 7pm, Monday – Saturday and Sunday: 7pm – 5pm

Ucare is also on there however they try to sell drugs from suppliers they have commercial agreements with and I find they rarely have the drugs my doctor prescribes for me.

The pharmacy right beside Lucky's Sihanouk is also good.

La Gare is the one for me

UCare is in both PP and SR and generally v good.

Almost all of the pharmacy in phnom penh sell the same things. The thing is, when you buy, you tell them you want a french made medicine, it conveys you're willing to pay for the best quality ones.

Pharmacie de la gare has a real pharmacist. U-care has sales people in lab coats who have no idea about medicine. The stuff is real, but they can't even read French. I've had a guy swear to me the French medicine he sold me was one thing, but when I checked with a friend it was another. Potentially life-threatening. Know exactly what you want with these guys.

De La Gare pharmacist told me confidently and certainly that the french version of what i was looking for was ok during pregnancy - an internet check on the main ingredient and reading the instructions in the packet told me that it was definately NOT recommended during pregnancy - just double check everything anyway.

Chan penh voung on sihanouk across from ice computers and next door to a temple. The only pharmacy that my mom and I use.