Who says anti-impotence drugs are only for old men? A two-year-old boy in Britain is dependent on Viagra – but for a different reason.

Oliver Sherwood takes the medicine four times a day to control pulmonary hypertension (PH), a rare and heart and lung condition that causes chronic high blood pressure, The Daily Telegraph reported on Wednesday.

PH causes blood pressure in the lungs to rise, putting strain on the heart and reducing blood oxygen levels. The kid can’t walk more than a few steps without getting out of breath.

The toddler also faces an uncertain future due to some proposed cuts by the National Institute for Clinical Excellence, UK’s drug rationing agency. As Oliver grows up, he will need to switch to more expensive treatments to control his condition, which may not be available if the cuts go ahead, his family said.

His mother, Sarah, 34, has launched a petition to keep funding open for PH treatments at the National Health Service. “Viagra is an expensive drug but it’s one of the cheapest to treat PH. When he started taking it the change was fantastic – I had my little boy back,” she said.