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60 <br />* Paranoia, which can trigger mental disorders in users prone to mental instability <br />* Irritation of the nostrils and nasal membrane <br />* Mood swings <br />* Anxiety <br />* Reduced sense of humor <br />* Compulsive behavior, such as teeth grinding or repeated hand washing. <br /> <br />Amphetamines are drugs that stimulate the central nervous system and promote a feeling of alertness <br />and an increase in speech and general physical activity. Some common street names for amphetamines <br />are "speed", "uppers", "black beauties", "wake-ups", "footballs", and "dexies". <br /> <br />People with a history of sustained low-dose amphetamine use quite often become addicted, believing <br />that they need the drug to get by. These users frequently keep taking amphetamines to avoid the <br />"down" mood they experience when the drug wears off. <br /> <br />Even small, infrequent doses can produce toxic effects in some persons. Restlessness, anxiety, mood <br />swings, panic, heart rhythm disturbances, paranoid thoughts, hallucinations, convulsions and coma <br />have been reported. Long-term users often have acne resembling measles, trouble with their teeth, <br />gums and nails, and dry, dull hair. Heavy, frequent use can produce brain damage resulting in speech <br />disturbances. <br />Other Effects: <br /> <br />* Loss of appetite <br />* Irritability, anxiety, depression <br />* Increased heart rate and blood pressure <br />* Difficulty in focusing eyes <br />* Exaggerated reflexes <br />* Distorted thinking <br />* Perspiration, headaches, dizziness <br />* Short-term insomnia <br /> <br />Opiates include heroin, morphine, codeine and narcotics used to relieve pain and induce sleep. <br />Heroin, also called "junk" or "smack", accounts for 90% of the narcotic abuse in this country. <br /> <br />Sometimes narcotics found in medicines are abused. This includes pain relievers containing opium <br />and cough syrups containing codeine. Heroin is illegal and cannot even be obtained with a physician's <br />prescription. <br /> <br />Most medical problems are caused by the uncertain dosage level, the use of unsterile needles, <br />contamination of the drug, or the combination of a narcotic with other drugs. These dangers depend on <br />the specific drug, its source and the way it is used. <br /> <br />Other Effects: <br />* Short-lived euphoria <br />* Impaired driving ability <br />* Drowsiness, followed by sleep <br />* Constipation