Steffie, you're in the best position to know about metallic taste you are experiencing as a side effect - look at your patient information leaflet that should have been supplied with each new medication. If you didn't get one, then ask the pharmacist who dispensed them.
However, as a vast generalisation, many side effects are more noticeable in the early days of taking. Also, some medications come with instructions about when to take them eg in relation to mealtimes and bedtime, to minimise impacts of side effects.