Patients are suffering because of a shortage of some NHS prescription medicines, a parliamentary group has warned.

Medicine shortages are having an “adverse” impact on patients, including vulnerable groups such as those with mental health problems, the All-Party Pharmacy Group said.

In a report detailing its inquiry into medicine shortages, the group said the shortages had been mainly caused by the export of medicines intended for the UK market to other EU countries.

This exporting is conducted by speculators and is legal under EU and UK law, the report noted.

Highly qualified pharmacists are having to spend time locating medicines in short supply, the MPs noted.

But in spite of the best efforts of pharmacists, the group said it had been told of cases involving vulnerable patients not receiving the medicine they need because of shortages.

These included patients with mental health problems, epilepsy sufferers, diabetics, and even pregnant women in need of medicine to stabilise their pregnancy.

“Evidence we received highlights the stress, anxiety and sometimes harm that patients suffer,” the MPs said in their report.

The group warned that the UK has been experiencing shortages of NHS prescription medicines for four years.

“We have no objection to the export of medicines in principle, so long as this practice does not harm patients,” they said.

“However, throughout this inquiry, we have seen evidence that patients are suffering and that pharmacists’ time and resources are being diverted away from patient care as a result of medicines being in short supply.”

In its report, the group calls for a “renewed sense of urgency” to deal with the problem by those organisations involved in the supply of medicine.

The government must “unequivocally” state that the interests of UK patients must come first and not provisions concerning the free movement of goods, it said.

A Department of Health spokeswoman said: “It is vital that patients get the medicines they need. In the vast majority of cases they do.

“There are nearly 900 million prescriptions dispensed a year, almost 11,000 community pharmacies and some 16,000 medicines so some shortages and delivery delays are inevitable.

“We monitor medicines supply closely and we continue to work closely with representatives of the medicines supply chain to ensure that NHS patients receive the medicines they need.

“We have well established arrangements for dealing with supply issues, to minimise any potential impact on patients.

“Much of this work goes unseen, as difficulties are prevented before they happen.

“We will carefully consider the recommendations the All-Party Pharmacy Group make in their report.”