While herbs and spices are natural and usually tolerated in the body more easily than drugs are they still contain chemical properties that may cause side-effects in some people.
Unless you are adept at creating tea blends don't this on your own. There's a science to measuring and blending herbs to create the right effects in the proper dosage. It's not a matter of just adding 1 teaspoon each of Chamomile, Valerian and Skullcap to one cup of water for a restful night's sleep. Well, sometimes it is, but other times not. You could do more damage than good.
Always be sure to double-check any possible side-effects or possible drug interactions on your own before trying any new tea recipe.
Do not use herbs, berries or flowers that have been contaminated with animal wastes, roadside vehicle pollution or chemical fertilizers and pesticides. For example, picking Dandelions is suitable from a mountain field, but never by a freeway. To avoid doubt, unless you have your own garden, ordering your ingredients is a wiser choice.
Never use tea as a medicinal without talking to your health care provider first, especially if you are on medications or have a medical condition that is being treated.
Make sure your honey is all, pure honey. Do your research. One must be careful about not ending up with a combination of honey and corn syrup. Read your labels and, at the very least, avoid very cheap brands. Visiting the health food section of your store or the farmer's market is best for avoiding honey with additives. And, they don't have to put additives on labels if the additives are under a certain percent. They can also say all-natural and organic if all the additives are all-natural or organic.
DO NOT boil your honey. When honey is boiled it loses delicate flavors and sweetness and produces a chemical called hydroxymethyl furfuraldehyde (HMF) as well as increasing peroxides. Not good. Over time this can act as a poison in the body. Wait to add honey for sweetness at the time of drinking it, which is after it has cooled a bit.
Children under the age of 1 year old should never have Honey. Honey contains spores of Clostridium botulinum bacteria, which can cause botulism in infants. These spores, found in dirt and dust, can contaminate honey. These bacteria are harmless to more mature digestive systems, but in young babies the digestive system hasn't developed the ability to handle the spores. In infants, the bacteria multiplies and produces a toxin that is poisonous to the infant. In fact, I don't suggest honey to be given to a child under 18 months, unless the child is over 1 year old and already has a healthy diet of a variety of foods.