Wondering if anyone can help me. I'm on 100mil of Declan a day due to depression brought on by endometriosis. I take this every morning. I'm currently, also, on antibiotics for a chest infection which I take twice a day. Anyone know if anything bad can happen from accidentally take another 100mil of serlan? I wasn't paying attention when I picked up the box and suddenly realised what I'd done when I swallowed it!