You can take cold medicine after eating hairy crabs, and it won't affect you.

Because the main nutritional components of hairy crabs are protein, fat, cholesterol, vitamin A, vitamin E, vitamin B, and minerals such as calcium, phosphorus, potassium, iron, magnesium, sodium, zinc, selenium and copper, the food components will not conflict with the drug components after eating crabs.

Important reminder:

Many people like to eat crabs with yellow wine, white wine, etc., but they should not drink alcohol or any alcoholic drinks during taking cold medicine, which needs attention.