<<Disclaimer: Verify this information before applying it to your situation.>>

It may not be - certified - gluten free by the manufacturer but it has no gluten ingredients. As a Pharmacist, I've called about this same exact drug this week. I was told by the Lupin professional provider line that it contains NO gluten ingredients. It's a very common practice for MFG's to to tell patients a drug is not "certified gluten free". It means they haven't had it certified. As are most generics except for "GF only" manufacturers.

Here is a way some people can find out that is useful: http://dailymed.nlm.nih.gov/dailymed/lookup.cfm?ndc=68180029606&start=1&labeltype=all
This is the listing of ingredients direct from the FDA.

Many drugs are not certified but have no gluten.  Here is the home page, it contains every drug sold in the USA, you look it up by drug name or NDC number. Scroll down to the grey and white listing of excipients at the bottom of the page. Lists of gluten free excipients can be found on web.

Here is your duloxetine capsule, delayed release by Lupin:
AMMONIA	 
CROSCARMELLOSE SODIUM	 
FD&C BLUE NO. 2	 
FERRIC OXIDE YELLOW	 
FERROSOFERRIC OXIDE	 
GELATIN	 
HYPROMELLOSE PHTHALATE (31% PHTHALATE, 40 CST)	 
HYPROMELLOSES	 
LACTOSE MONOHYDRATE	 
MAGNESIUM STEARATE	 
POLYSORBATE 80	 
POTASSIUM HYDROXIDE	 
PROPYLENE GLYCOL	 
SHELLAC	 
SODIUM LAURYL SULFATE	 
STARCH, PREGELATINIZED CORN	 
TALC	 
TITANIUM DIOXIDE	 
TRIETHYL CITRATE

 There are no gluten ingredients in it.

To look up the ingredients and manufacturer inc. contact info of any drug: http://dailymed.nlm.nih.gov/dailymed/lookup.cfm and put in the drug name or NDC code. Every MFG will be listed.

Visit the Celiac Web Page at Http://www.enabling.org/ia/celiac/index.html
Archives are at: Http://Listserv.icors.org/SCRIPTS/WA-ICORS.EXE?LIST=CELIAC