Cryselle 28 and Talwin NX

• Generic Name: ethinyl estradiol / norgestrel
• Dosage Forms: tablets
• Other Brand Names: Cryselle 28, Low-Ogestrel, Ogestrel-28, Cryselle-28, Elinest, Ogestrel, Lo/Ovral-21, Lo/Ovral-28, Ovral, Ovral-28, Low-Ogestrel-21, Ovral-21

Cryselle 28 is a combination birth control pill containing female hormones that prevent ovulation (the release of an egg from an ovary). This medication also causes changes in your cervical mucus and uterine lining, making it harder for sperm to reach the uterus and harder for a fertilized egg to attach to the uterus.

Cryselle 28 is used as contraception to prevent pregnancy.

Cryselle 28 may also be used for purposes not listed in this medication guide.

• Generic Name: naloxone / pentazocine
• Dosage Forms: n.a.
• Other Brand Names: Talwin NX

Pentazocine and naloxone combination is used to relieve moderate to severe pain.

Pentazocine belongs to the group of medicines called narcotic analgesics (pain medicines). It acts on the central nervous system (CNS) to relieve pain.

Naloxone is an opioid antagonist. It acts on the CNS to block the effects of narcotics, especially the "high'' feeling that makes you want to use them. It will not produce any narcotic-like effects or cause mental or physical dependence.

When pentazocine is used for a long time, it may become habit-forming, causing mental or physical dependence. However, people who have continuing pain should not let the fear of dependence keep them from using narcotics to relieve their pain. Mental dependence (addiction) is not likely to occur when narcotics are used for this purpose. Physical dependence may lead to withdrawal side effects if treatment is stopped suddenly. However, severe withdrawal side effects can usually be prevented by gradually reducing the dose over a period of time before treatment is stopped completely.

This medicine is available only with your doctor's prescription.