Serious

• Rapid weight gain may cause your body to retain water
• Signs of infection such as fever, severe chills, sore throat or mouth ulcers
• Unexpected bleeding or bruising
• Chest pain, irregular heart rhythm
• Cough, having difficulty breathing or painful breathing
• Feeling light-headed, dizzy or fainting
• Nausea with loss of appetite, dark-colored urine, yellow skin or eyes
• Rash, red skin with blisters on the lips, eyes, skin or mouth, peeling skin, fever, raised red or purple skin patches, itching, burning sensation, pustular eruption
• Severe abdominal pain, blood in your vomit, stools or urine, black stools
• Severely decreased urine output, feeling thirsty
• Feeling sick with diarrhea and vomiting, abdominal pain or fever
• Severe headache, weakness or paralysis of limbs or face, difficulty speaking, sudden loss of consciousness
• Pale skin, feeling tired, breathlessness and having dark urine
• Eye pain or deterioration in vision
• Pain in your hips or difficulty walking
• Numb or cold toes and fingers
• Sudden swelling and redness of the skin
• Difficulty hearing
• Muscle weakness and spasms with an abnormal heart rhythm
• Bruising
• Stomach pain with feeling sick
• Pelvic pain sometimes with nausea and vomiting, with unexpected vaginal bleeding, feeling dizzy or fainting due to low blood pressure

Common

• Headache or feeling tired
• Feeling sick (nausea), being sick (vomiting), diarrhea or indigestion
• Rash
• Muscle cramps or joint, muscle or bone pain
• Swelling such as round your ankles or puffy eyes
• Weight gain
• Anorexia, weight loss or a disturbed sense of taste
• Feeling dizzy or weak
• Difficulty in sleeping (insomnia)
• Discharge from the eye with itching, redness and swelling (conjunctivitis), watery eyes or having blurred vision
• Nose bleeds
• Pain or swelling in your abdomen, flatulence, heartburn or constipation
• Itching
• Unusual hair loss or thinning
• Numbness of the hands or feet
• Mouth ulcers
• Joint pain with swelling
• Dry mouth, dry skin or dry eye
• Decreased or increased skin sensitivity
• Hot flushes, chills or night sweats

HOW TO COPE WITH SIDE EFFECTS?
The occurrence of side effects varies from person to person. The following are a few ways of dealing with some of the common side effects. However, consult your doctor if these persist.
Coping with Nausea and Vomiting
You can help yourself by eating small, frequent meals rather than large ones and drinking plenty of fluids. Eat slowly. Avoid fatty, fried, spicy and very sweet foods. Eat cold or slightly warm food if the smell of cooked or cooking food makes you feel sick. Get plenty of fresh air. You could also try chewing ginger or drinking ginger tea. Eat bananas to replace potassium in your blood which can drop if you are sick (vomit). Use oral rehydration salts to replace vitamins and minerals lost through being sick. There are some medicines that can help you stop feeling sick. Speak to your doctor if your condition does not improve.
Coping with Rash
There are many treatments for a wide range of skin problems. Avoid hot showers or baths because hot water can irritate the skin. Make sure to pat your skin dry after a bath or shower. Do not rub or scratch the affected area. Leave the skin exposed to the air as much as possible. Do not use perfumed soaps or deodorants. Water containing chlorine can make most skin problems worse so avoid swimming. Avoid spicy foods, alcohol, tobacco smoke and caffeine as it may also make itching worse. Avoid excessive sun exposure, always use sunscreen and protective clothing when outdoors. Moisturizers can be used regularly to soothe and hydrate the affected area. If it does not get better within a week, speak to a pharmacist or doctor.