No, I would not recommend the Atkins Diet and yes it is considered unhealthy. For example:
Unpleasant side effects can occur with the Atkins diet. To start with, burning fat results in the production of substances called ketone's as your body enters a state called ketosis. This can result in bad breath, tiredness, weakness, dizziness, insomnia and nausea. Constipation may also occur as a consequence of avoiding typically high-fiber foods such as fruit, veg, beans, wholewheat pasta, brown rice, wholegrain breakfast cereals and jacket potatoes.
When it comes to long-term side effects, many health professionals are concerned that the Atkins diet may have serious dangers. While the high intake of fat, particularly saturates, may increase the risk of heart disease, there are also concerns that the unbalanced nature of the Atkins diet may lead to nutritional deficiencies, which cause health problems in later life. For example, poor intakes of bone-building calcium (found in dairy products) may increase the risk of osteoporosis, while poor intakes of antioxidant nutrients (found in fruit and veg) have been linked with a host of health problems ranging from heart disease and cancer to premature ageing and cataracts. Some experts are also worried that high intakes of protein may cause kidney problems or weaken bones.
If you really want to lose weight, eat smaller meals 4 to 6 times a day and start an exercise program.
Good luck and best wishes.