Yes, there are several alternative remedies to catnip for calming down cats. Here are some of the most effective ones:

1. Valerian Root – Valerian root is an herbal supplement that has a calming effect on cats. It is available in the form of capsules or liquid extracts. However, it is important to note that valerian root has a strong odor, which some cats may find off-putting.
2. Chamomile – Chamomile is another herb that has a calming effect on cats. It is available in the form of tea or tincture. However, it is important to note that chamomile may cause an allergic reaction in some cats, so it is important to monitor your cat closely after giving it chamomile.
3. Honeysuckle – Honeysuckle is a natural alternative to catnip that some cats find appealing. It is available in the form of toys or dried leaves. However, it is important to note that honeysuckle may cause an upset stomach in some cats, so it is important to monitor your cat closely after giving it honeysuckle.
4. Silver Vine – Silver vine is another natural alternative to catnip that some cats find appealing. It is available in the form of toys or dried leaves. However, it is important to note that silver vine may cause an upset stomach in some cats, so it is important to monitor your cat closely after giving it silver vine.
5. Music Therapy – Music therapy can have a calming effect on cats. There are several CDs and playlists available that are specifically designed for cats. The music is usually composed of soothing sounds and rhythms that help to reduce anxiety and stress.
6. Pheromone Therapy – Pheromone therapy is a natural way to calm down cats. It involves using synthetic pheromones that mimic the scent of a cat’s natural pheromones. These pheromones help to create a sense of calm and relaxation in cats.
7. Acupuncture – Acupuncture can help to reduce anxiety and stress in cats. It involves inserting small needles into specific points on the body. This helps to stimulate the release of endorphins, which are natural painkillers and mood elevators.

In conclusion, there are several alternative remedies to catnip for calming down cats. It is important to choose the right remedy based on your cat’s individual needs and preferences. It is also important to monitor your cat closely after giving it any of these remedies to ensure that it does not have an adverse reaction.