A mother is outraged after driving past a billboard which asks people if they want longer lasting sex.
Anita Khatker, mother of two was in disbelief when she read the advert by the Advanced Medical Institute which has been put up in Station Road, Hayes.
The company's adverts have caused offence across the country and the complaints are being investigated by the Advertising Standards Authority.
Mrs Khatker said: "I was absolutely shocked, I just thought it was so inappropriate in the middle of the high street. It's just so blatantly in your face.
"Obviously as a mother you want to protect your children and my daughter is five so she is at that age where she has started to read.
"My fear is that she will ask me what the words mean.
"We live in a very impressionistic society and I just think this ad has been placed in completely the wrong forum.
"As a parent I want to be able to protect my children's innocence for as long as possible and I want to be able to control what they see."
A spokesperson for the Advertising Standards Agency, said: "We are investigating complaints as we speak because of the number of people who found the ad offensive.
"But we have also asked the company to remove its billboard as they are advertising a prescription-only medicine which is against the law.
"At present they have refused to comment but we have the power to remove ads before our investigation has been completed and we will take action if they fail to co- operate."