http://alcoholism.about.com/od/slang/g/term_blue-birds.htm

http://www.noslang.com/drugs/dictionary/b/

http://www.erowid.org/psychoactives/slang/slang.shtml 


Blue Birds = Amobarbital (Barbiturate)

BarbituratesCOMMON & BRAND NAMES
Barbs; Barbies; Downers; Blues; Nembies; Seccies
EFFECTS CLASSIFICATION: depressant
DESCRIPTION: Barbiturates are a class of sedative drugs prescribed for anxiety and insomnia. Barbiturates were widely available on the street in the 1970s and '80s, though less so in the '90s and '00s.

http://www.erowid.org/chemicals/barbiturates/barbiturates_info2.shtml
Barbiturates have two major effects. These are sedative (which decrease anxiety) and hypnotic (which help sleep). Many drugs have both effects, often having a sedative effect at low doses and a hypnotic effect at high doses.BarbituratesBarbiturate sleeping pills include Tuinal, Seconal and Nembutal and are most often misused for their intoxicating effect. Becuase of this, there are less barbiturates being prescribed. Non-medically available barbiturates bought on the street originate from medical sources and are usually imported or sold by users with prescriptions. Misusers will normally take the pills orally, often taken with alcohol although they are sometimes injected. To do this the capsules are opened and the powder is added to water. The small particles of undissolved substance can cause damage to veins.Like alcohol, barbiturates depress the central nervous system and have similar effects lasting from 3 to 8 hours depending on the dose. A small dose usually makes people feel relaxed as if they'd had one or two drinks. With larger doses the effects are more unpredictable and the sedative effects takes over. A user trying to stay awake after a moderate to large dose (several pills) will often become clumsy with poor control over speech and body, rendering them liable to accidental injury. There can be extreme and unpredictable emotional reactions and mental confusion.Large doses can lead unconsciousness and eventually respiratory failure and death. Fatal overdose is an ever present danger as the required amount for overdose is not much more than the recommended normal dose. The effects and dangers are greatly increased if Barbiturates are taken with alcoholPhysical dependence is likely to develop with Barbiturates if a certain threshold value is exceeded. The dependence has a strong psychological as well as physical basis, and after high doses the withdrawal effects can include irritability, nervousness, inability to sleep, faintness and nausea, twitching, delirium and sometimes convulsions with may be associated with long term brain damage. Sudden withdrawl from high doses of Barbiturates can be fatal.Heavy users are also liable to develop bronchitis and pneumonia (due to the cough reflex being depressed) and hypothermia (becuase the drug blocks normal responses to cold) and repeated accidental overdose. Most of these risks are increased if Barbiturates are injected, which is by far the most dangerous form of drug taking.

I think someone posted something about the drug slang so I looked up some stuff on BlueBirds