Kietzman D, Bock KW, Krahmer B, Kettler D, Bircher J: Paracetamol test: modification by renal function, urine flow, and pH
It has been speculated that the continued use of bethanechol may result from its use in patients who find the option of undergoing urinary catheterisation intimidating & choose to exhaust less invasive treatment options first, or in select patients where it seems to provide a marginal benefit (Gaitonde et al, 2019)
Unfortunately, many regular doctors are reluctant or unable to run many functional lab tests that may be needed to detect some underlying issues causing your symptoms
Wang J, Jones SM, Pongracic JA, Song Y, Yang N, Sicherer SH et al (2015) Safety, clinical, and immunologic efficacy of a Chinese herbal medicine (Food Allergy Herbal Formula-2) for food allergy
Its the regulatory body that approves drugs to be able to be sold in the UK market