Furious campaigners warned last night that easy access to the drug will lead to a huge increase in teenage pregnancies and abortions.
The controversial move comes only days after ministers announced that contraceptive pills and condoms will be given to schoolchildren.
The abortion pill - known as RU486 - requires no surgery and makes terminations easier and faster.
It is taken in the first nine weeks of pregnancy and effectively causes a miscarriage.
At the moment access is restricted, but under the shake-up teenagers and women will be able to obtain the drugs easily from NHS family planning clinics and GPs.
However, campaigners said making it easier for girls to gain contraceptives and abortion will only worsen Britain's appalling teenage pregnancy rate. It is already one of the highest in Europe.
Promiscuity will increase and result in even more terminations, especially among the young, they warn.
There are also fears that some teenagers resorting to the abortion pill could lose the ability to have children in later life.
And the spread of sexually transmitted infections could also worsen. Numbers have already doubled among the young in the last five years.
Josephine Quintavalle, of the Pro-Life Alliance, said: 'This move is irresponsible and short-term.
'We have a government which is obsessed by offering abortion without thinking about the consequences. These are not drugs for children - there is the potential for danger particularly in the developing body.
'The idea of younger girls using this is just unbelievable.'
Nuala Scarisbrick, trustee of the charity LIFE, said: 'The Government is clearly going to be targeting this at young people - they say it is quick and easy for women.
'Women, and particularly young women, are being betrayed.
'They are being handed out pills and condoms in school which encourage them to experiment and get sexual diseases and now they are being told not to worry, because there is an easy abortion option for them. It is an appalling deceit.'
Conservative Party deputy leader Michael Ancram condemned the move as ' socially damaging' and ' morally questionable'.
'Personally I am against it because I think that anything that makes abortion easier and simpler, in the end is harmful to people,' he added.
Abortions among the under-16s have risen relentlessly during the past decade, from 3,510 in 1992 to 4,382 in 2000.
But, despite warnings that this will worsen, it will be easier for them to obtain a so-called medical abortion using the pill. The change means many patients will no longer have to go to hospital or pay around £300 for a surgical termination at a private clinic.
Patients will still have to obtain certification from two doctors before they can go ahead with the procedure, which involves taking two different drugs over two days.
The costs to the NHS will be lower as there will be no need for anaesthetists, operating theatre staff or surgeon.
Miss Quintavalle added: 'You save a lot of money not using anaesthetics. It is quicker, easier and cheaper - I would put cheaper in very big capitals.
'This is being touted as an easy method, well it may not be easy either physically or emotionally.
'The woman is very much involved.
'She sees what is happening and may find it very hard to come to terms with what she has done as she may see the foetus.'
The controversy surrounds plans outlined in a Department of Health document, Implementing the Sexual Health Strategy.
The Government is committed to cut the rate of conceptions among under-18s by 15 per cent by 2004 and to halve it by 2010.
More than 8,000 girls under 16 become pregnant every year. Including the under-18s pushes the figure up to around 41,000.
A Department of Health spokesman said: 'The strategy pointed out that younger people tend to go for advice later in their pregnancy. If they are going to have a termination they need to do so as soon as they can.
'This could be useful for young people, but it is not targeted at them. It is not excluding them either, because it would not be right to exclude anyone on grounds of age.'
Officials said widening access to the abortion pill aimed to slash waiting lists for operations.
Patients can wait five or six weeks for a surgical termination, increasing their anguish.
The Department was unable to provide statistics on the cost of surgical and medical abortions last night.
The spokesman added: 'This is not about cost cutting. Using the medical abortion just means people do not have to have surgery.' The British Pregnancy Advisory Service has already allowed more than 1,000 women to undergo an abortion using the pill at home, after being monitored by doctors in a clinic.
Ian Jones, chief executive, said: 'Our experience is this is a safe and effective method. Some women find it not very painful, and others find it very painful, but they prefer this to surgery.'
So-called 'bedroom abortions' have proved popular with those who want a quick solution without surgery, in the relative privacy and comfort of their own home.
There is a trained nurse available over the phone if needed.
Just under 20 per cent of the 188,000 women undergoing NHS abortions every year use the abortion-pill early in their pregnancy. First they take the drug, mifepristone, which blocks the hormone needed to make a fertilised egg cling to the womb lining. This cuts off the foetus from the blood and nourishment needed for life.
A second drug called misopristol is used 48 hours later. But it has been at the centre of health fears over womb rupture when used on women with more advanced pregnancies.
Another drug which may be used, called gemeprost, has known side-effects including nausea, vomiting, rashes and severe womb pain during contractions.
Womb and urinary infections have also been reported.
Source : http://www.dailymail.co.uk/health/article-126788/Abortion-pill-teenagers.html1051