• Codeine or 3-methylmorphine (a naturally occurring methylated morphine) is an opiate used for its analgesic, antitussive, antidiarrheal,antihypertensive, anxiolytic, antidepressant, sedative and hypnotic properties

• chemical formula C₁₈H₂₁NO₃ 

• Molar mass 299.364 g/mol

• To treat mild to moderate pain and to relieve cough

• to treat diarrhea and diarrhea-predominant irritable bowel syndrome, although loperamide (which is available OTC for milder diarrhea), diphenoxylate, paregoric or even laudanum (also known asTincture of Opium) are more frequently used to treat severe diarrhea

•  drowsiness and constipation

•  Less common are itching, nausea, vomiting, dry mouth, miosis, orthostatic hypotension, urinary retention, depression, and, paradoxically, coughing

•  Rare adverse effects include anaphylaxis, seizure, acute pancreatitis and respiratory depression. As with all opiates, longer-term effects can vary but can include diminished libido, apathy and memory loss

• Allergies - the swelling of skin and rashes

• chemically named N-acetyl-p-aminophenol
• widely used over-the-counter analgesic (pain reliever) and antipyretic (fever reducer).
• classified as a mild analgesic
• Chemical formula C₈H₉NO₂  
• Molar mass  151.163 g/mol

• Also known as acetylsalicylic acid
• Chemical formula : C₉H₈O₄  
• Molar mass : 180.157 g/mol

• Relieves pain caused by headache [ Among primary headaches, the International Classification of Headache Disorders distinguishes between tension headache (the most common),migraine, and cluster headache. Aspirin or other over-the-counter analgesics are widely recognized as effective for the treatment of tension headache. Aspirin, especially as a component of an acetaminophen/aspirin/caffeine formulation, e.g., Excedrin Migraine, is considered a first-line therapy in the treatment of migraine, and comparable to lower doses of sumatriptan. It is most effective at stopping migraines when they are first beginning. There is little data that suggest the aspirin is an effective treatment for cluster headache.]  
• Reduces fever [pirin's ability to control fever is due to its action on the prostaglandin system through its irreversible inhibition of COX. ]  Prevent heart attacks and stroke [ In lower doses, aspirin has been known to prevent the progression of existing cardiovascular disease, and reduce the frequency of these events for those with a history of them. (This is known as secondary prevention.) 
• Aspirin is a first-line treatment for the fever and joint pain symptoms of acute rheumatic fever. The therapy often lasts for one to two weeks, and is rarely indicated for longer periods. After fever and pain have subsided, the aspirin is no longer necessary, since it does not decrease the incidence of heart complications and residual rheumatic heart disease.
• Blood clotting

• Causes internal bleeding ulceration (not suitable for gastric patients) 
•  For a small number of people, taking aspirin can result in symptoms resembling an allergic reaction, including hives, swelling and headache. The reaction is caused by salicylate intolerance and is not a true allergy, but rather an inability to metabolize even small amounts of aspirin, resulting in an overdose.
•  Aspirin can induce angioedema (swelling of skin tissues) in some people. In one study, angioedema appeared one to six hours after ingesting aspirin in some of the patients. However, when the aspirin was taken alone, it did not cause angioedema in these patients; the aspirin had been taken in combination with another NSAID-induced drug when angioedema appeared.

• Codeine or 3-methylmorphine (a naturally occurring methylated morphine) is an opiate used for its analgesic, antitussive, antidiarrheal,antihypertensive, anxiolytic, antidepressant, sedative and hypnotic properties

• chemical formula C₁₈H₂₁NO₃ 

• Molar mass 299.364 g/mol

• To treat mild to moderate pain and to relieve cough

• to treat diarrhea and diarrhea-predominant irritable bowel syndrome, although loperamide (which is available OTC for milder diarrhea), diphenoxylate, paregoric or even laudanum (also known asTincture of Opium) are more frequently used to treat severe diarrhea

•  drowsiness and constipation

•  Less common are itching, nausea, vomiting, dry mouth, miosis, orthostatic hypotension, urinary retention, depression, and, paradoxically, coughing

•  Rare adverse effects include anaphylaxis, seizure, acute pancreatitis and respiratory depression. As with all opiates, longer-term effects can vary but can include diminished libido, apathy and memory loss

• Allergies - the swelling of skin and rashes

• chemically named N-acetyl-p-aminophenol
• widely used over-the-counter analgesic (pain reliever) and antipyretic (fever reducer).
• classified as a mild analgesic
• Chemical formula C₈H₉NO₂  
• Molar mass  151.163 g/mol

• Also known as acetylsalicylic acid
• Chemical formula : C₉H₈O₄  
• Molar mass : 180.157 g/mol

• Relieves pain caused by headache [ Among primary headaches, the International Classification of Headache Disorders distinguishes between tension headache (the most common),migraine, and cluster headache. Aspirin or other over-the-counter analgesics are widely recognized as effective for the treatment of tension headache. Aspirin, especially as a component of an acetaminophen/aspirin/caffeine formulation, e.g., Excedrin Migraine, is considered a first-line therapy in the treatment of migraine, and comparable to lower doses of sumatriptan. It is most effective at stopping migraines when they are first beginning. There is little data that suggest the aspirin is an effective treatment for cluster headache.]  
• Reduces fever [pirin's ability to control fever is due to its action on the prostaglandin system through its irreversible inhibition of COX. ]  Prevent heart attacks and stroke [ In lower doses, aspirin has been known to prevent the progression of existing cardiovascular disease, and reduce the frequency of these events for those with a history of them. (This is known as secondary prevention.) 
• Aspirin is a first-line treatment for the fever and joint pain symptoms of acute rheumatic fever. The therapy often lasts for one to two weeks, and is rarely indicated for longer periods. After fever and pain have subsided, the aspirin is no longer necessary, since it does not decrease the incidence of heart complications and residual rheumatic heart disease.
• Blood clotting

• Causes internal bleeding ulceration (not suitable for gastric patients) 
•  For a small number of people, taking aspirin can result in symptoms resembling an allergic reaction, including hives, swelling and headache. The reaction is caused by salicylate intolerance and is not a true allergy, but rather an inability to metabolize even small amounts of aspirin, resulting in an overdose.
•  Aspirin can induce angioedema (swelling of skin tissues) in some people. In one study, angioedema appeared one to six hours after ingesting aspirin in some of the patients. However, when the aspirin was taken alone, it did not cause angioedema in these patients; the aspirin had been taken in combination with another NSAID-induced drug when angioedema appeared.