MHRA009-a) Betahistine 210420-011022
Safety concern over Theophylline Contamination
Use this search to identify patients who have been supplied Betahistine Tablets. First distributed 21/04/2020 exp. 01/10/2022. Kent Pharmaceuticals Ltd has informed that several affected batches are contaminated with theophylline due to a cross-contamination.
Advice for healthcare professionals
- The risk of adverse reactions is low with respect to the level of contamination. However, if patients experience any side effects related to hypersensitivity or those not normally experienced with betahistine, please ensure appropriate clinical advice is sought.
- Any suspected side effects should also be reported via the Yellow Card Scheme
MHRA010-a) DOAC and ANY Valve Replacement, MHRA010-b) DOAC and MECHANICAL Valve Replacement coded
NatPSA/2021/006/NHSPS -Inappropriate anticoagulation of patients with a mechanical heart valve
These searches identify patients coded as having a ANY or a MECHANICAL heart valve replacement coded & currently is on a DOAC.
Use this search to identify any heart valve patients on a DOAC and switching to VKA or consider askling Cardiologist if the valve type requires VKA.
All patients with prosthetic mechanical heart valves require life-long oral anticoagulation with a vitamin K antagonist (VKA), usually warfarin, as these valves predispose the patient to systemic embolism. Thrombosis of a prosthetic valve is potentially lifethreatening as it can result in haemodynamically severe stenosis or regurgitation and acute heart failure. The risk depends on the type of valve, its position, and other factors. Since 1 March 2020, 14 incidents have been reported of patients with a mechanical heart valve being switched to a LMWH or a DOAC.
Inappropriate anticoagulation of patients with a mechanical heart valve; Additional patient identification search.
Following the National Patient Safety Alert, highlighting the need to review those patients who have received a mechanical heart valve and who may now be inappropriately anticoagulated, system suppliers have produced searches looking for mechanical heart valve codes in patients on DOACs. We have noted that the searches will require precise coding of the valve type in order to identify patients who may be at risk of inappropriate anticoagulation. We are aware that specific valve type coding may not be universal practice and that some patients may remain vulnerable due to inappropriate anticoagulation.
Primary Care IT have produced a further search to identify DOAC use with any heart valve replacement. We have produced a standard enquiry letter for your local cardiology department, asking them to review the valve type and give you an urgent opinion on the appropriateness of a DOAC for your patient. We have also produced a carefully worded standard letter for your patient, explaining the situation and reminding them not to stop taking their medication until you have received a response.
We would advise running the additional search and, if it is not clear from correspondence whether the coded cardiac valve replacement is a metallic or mechanical valve, sending both letters and planning a follow up with the patient.
All of these resources can be downloaded from the PCIT Hub.
MHRA011-a) - Simvastatin: dose limitations with concomitant amlodipine or diltiazem
Key messages and actions: The maximum recommended dose for simvastatin in conjunction with amlodipine and diltiazem is now 20 mg/day.
MHRA013) Men on Valproate