Belladonna Self Adhesive Plaster stimulate blood flow to relieve aches and pains. Recommended for: Muscular tension and strain, stiff neck and aching shoulders, sciatica, lumbago, rheumatism and back ache. The plasters are self-adhesive containing tested and controlled levels of belladonna alkaloids (hyoscyamine) 0.25% w/w, a traditional remedy used for over 100 years for the relief of aches and pains. The soft cotton plasters are perforated to allow the skin to breathe.