Capsaicin cream. For most types of pain relief, your doctor may suggest you try capsaicin cream, lotion, ointment, gel, stick, film, or ointment. You usually don't need a prescription.

Experts say there is no effective alternative to capsaicin cream for many. 'I have had patients who rely on capsaicin cream, so this shortage is a real worry,' says Hertfordshire-based GP Mike Smith.