These are rare (may affect up to 1 in 1000 people). You may be having a serious allergic reaction if:

• You have difficulty breathing.
• Your face or throat swell.
• Your skin develops a severe rash.
• You experience blistering of the skin, mouth, eyes and genitals or your skin peels.
• Blood spots near the injection site which could develop into a purple blister surrounded by red inflamed skin.

Common side effects (may affect up to 1 in 10 people)

• Bleeding (haemorrhage).

• Anaemia. Reduction in red blood cells which can make the skin pale and cause weakness and breathlessness.

• A pooling of blood in tissues which may result in the skin appearing dark in colour, similar to a large bruise.

• Pain, itching, bruising or bleeding, redness, swelling, nodules or hard lumps under your skin where the injection was given.

Uncommon side effects (may affect up to 1 in 100 people)

• Changes in your blood test results. There may be a change in the clotting cells (platelets) in your blood. These tests will return to normal after innohep is stopped.

• An allergic reaction. You may be sensitive to one of the ingredients in this medicine.

• Bruising, red or purple spots under your skin.

• Some blood tests may also show a change in the way your liver is working. These tests will return to normal when innohep is stopped.

• An itchy red rash with heat and swelling on your skin (dermatitis).

• Rash.

• Itchy skin.

Rare side effects (may affect up to 1 in 1000 people)

• Your blood may form more harmful clots. A drop in the number of clotting cells (platelets) in your blood may give you these symptoms. Your doctor can explain this more.

• Changes in your blood test results. The amount of potassium may be increased. This is more likely to happen if you have severe kidney problems or diabetes. Your doctor can explain this more.

• Hives.

• Your bones may weaken and break more easily. This is known as osteoporosis and has been seen in patients using heparin for a long time.

• Prolonged, painful erections in men.