Chemically, nothing. All three of these drugs are derived from opium or the opium chemical structure and are in the Opiate class of drugs. The difference is primarily in the manner in which opium is refined or synthetically manufactured and the form and method of delivery.

Heroin, morphine and codeine are opiates derived from the resin of the opium poppy. Heroin is quickly metabolized to morphine. The body also changes codeine (used in some cold medicines) to morphine. Thus, the presence of morphine in the urine indicates heroin, morphine and/or codeine use. See similar questions...

Heroin is an opiod agonist. It's is a semi-synthetic drug which is derived from opium, and has the chemical formula C21H23NO3. Opium is produced by the opium poppy - papaver somniferum. The group of opiod agonists includes many other drugs, one is morphine, the direct derivative of opium. See similar questions...

Pure heroin is usually white. Street heroin is usually brown from impurities and adulterants. However there is no way to guage heroin purity just from looking at it. See similar questions...

Heroin is a more refined form of morphine, and requires a smaller dose for the same effect. Many opiates may be very efficient painkillers, with few euphoric effects, and the vice versa applies in a couple of examples. Heroin has very effective abilities in both the euphoric and analgesic areas. This essentially means that it creates an intense feeling of well being and relief from stresses and it relieves physical pains. See similar questions...

Heroin slows down breathing, and can stop it altogether. Most heroin overdoses occur when heroin is combined with other drugs with a depressant effect, particularly alcohol and sleeping pills like Valium or Normison. While overdoses caused by a single high IV dose of pure heroin may cause immediate death, many overdose victims do not fall into an immediate coma as is often the portrayal of OD in popular culture. See similar questions...

If a user ceases consumption of opiates after developing dependence, they will experience withdrawal. Physical withdrawal from heroin peaks on the 3rd or 4th day, and is pretty much over by the 8th day. Level of severity and types of withdrawal symptoms experienced can be very individual. A user consuming more each day will tend to have more severe symptoms than a friend using less, but gender, age, state of physical and mental health, and many other thing can affect this. See similar questions...

Although we are refused prescription heroin, users are offered drugs like methadone and buprenorphine, supposedly to "treat" your dependence. These drugs simply maintain your habit, and withdrawal will be experienced if you stop using them straightaway, same as with heroin. They can be very important, providing people with a way of functioning without heroin, but prescription diacetylmorphine could meet this role just as well. Naltrexone is a drug which blocks the effects of opiates. See similar questions...

Regular heroin use can lead to physical and psychological dependence. It takes using the drug daily for several weeks for this to occur. Regular use will also lead to increases in tolerance, meaning you will need more of the drug to achieve the same effect. The result of this is that many dependent users rarely reach the level of high which they are hoping for, instead spending most of their time at a functional level, with perhaps a decent high for a short time after the hit. See similar questions...

In smaller doses many users find that heroin stimulates libido, and increases sensuality and connection with a partner. Orgasm is generally more difficult to achieve, but this can prolong the sexual act and enjoyment. In larger doses orgasm may prove impossible, which can be frustrating, and some people find it embarrassing. In dependent users, high doses, out of control stress levels and a poor state of general physical health often contributes to suppress libido. See similar questions...

Some ravers first use heroin as a comedown drug, as it can aid sleep and relieve pains associated with a heavy nights partying. People should beware of trying to push too hard through existing amphetamine effects, especially if alcohol has been consumed. The combined depressant totals may be enough to significantly slow down the respiratory system. Cocaine and heroin is a fairly famous combination often referred to as speedballing. In other areas speed and heroin go by the same name. See similar questions...

My reply is that I have observed people who are hallucinating on medications. During those hallucinations they can not hold a logical conversation with me. They are completely lost in their hallucinations. In contrast, I have interrupted dying people who were conversing with deceased relatives that I could not see. When interrupted, they could talk with me in a completely rational fashion and make complete sense. See similar questions...

Some codeine products are available in Canada or other countries without a prescription, but it is against those countries law to export narcotics. Codeine is considered a narcotic. Also, it is illegal to ship non-approved FDA drugs like codeine into the US. See similar questions...